Endoglucanases

ABSTRACT

The present invention relates to enzyme preparations consisting essentially of an enzyme which has cellulytic activity and comprises a first amino acid sequence having the following sequence 
                 (SEQ ID NO:79)           Thr Arg Xaa Xaa Asp Cys Cys Xaa Xaa     1   2   3   4   5   6   7   8   9     Xaa Cys Xaa Trp Xaa     10  11  12  13  14                        
and a second amino acid sequence having the following sequence
 
                         Trp Cys Cys Xaa Cys (SEQ ID NO:80)         1   2   3   4   5                
wherein, at position 3 of the first sequence, the amino acid is Trp, Tyr or Phe; at position 4 of the first sequence, the amino acid is Trp, Tyr or Phe; at position 8 of the first sequence, the amino acid is Arg, Lys or His; at positions 9, 10, 12 and 14, respectively, of the first sequence, and at position 4 of the second sequence, the amino acid is any of the 20 naturally occurring amino acid residues with the provisos that, in the first amino acid sequence, (i) when the amino residue at position 12 is Ser, then the amino acid residue at position 14 is not Ser, and (ii) when the amino residue at position 12 is Gly, then the amino acid residue at position 14 is not Ala, performs very good in industrial applications such as laundry compositions, for biopolishing of newly manufactured textiles, for providing an abraded look of cellulosic fabric or garment, and for treatment of paper pulp. Further, the invention relates to DNA constructs encoding such enzymes, a method for providing a gene encoding for such enzymes, a method of producing the enzymes, enzyme preparations containing such enzymes, and the use of these enzymes for a number of industrial applications.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of application Ser. No. 09/229,911filed Jan. 13, 1999, now U.S. Pat. No. 6,387,690, which is a divisionalof application Ser. No. 08/651,136 filed May 21, 1996, now U.S. Pat. No.6,001,639 which is a continuation of PCT/DK96/00105 filed Mar. 18, 1996,and claims priority under 35 U.S.C. 119 of Danish application Nos.0272/95, 0888/95, 0887/95, 0886/95, 0885/95 and 0137/96 filed on Mar.17, 1995, Aug. 8, 1995, Aug. 8, 1995, Aug. 8, 1995, Aug. 8, 1995, andFeb. 12, 1996, respectively,

FIELD OF THE INVENTION

The present invention relates to novel enzyme preparations comprising anenzyme exhibiting endoglucanase activity which performs very good inindustrial applications such as laundry compositions, for biopolishingof newly manufactured textiles, for providing an abraded look ofcellulosic fabric or garment, and for treatment of paper pulp. Further,the invention relates to DNA constructs encoding such enzymes, a methodfor providing a gene encoding for such enzymes, a method of producingthe enzymes, enzyme preparations containing such enzymes, and the use ofthese enzymes for a number of industrial applications.

BACKGROUND OF THE INVENTION

Cellulases or cellulytic enzymes are enzymes involved in hydrolysis ofcellulose. In the hydrolysis of native cellulose, it is known that thereare three major types of cellulase enzymes involved, namelycellobiohydrolase (1,4-β-D-glucan cellobiohydrolase, EC 3.2.1.91),endo-β-1,4-glucanase (endo-1,4-β-D-glucan 4-glucanohydrolase, EC3.2.1.4) and β-glucosidase (EC 3.2.1.21).

Cellulases are synthesized by a large number of microorganisms whichinclude fungi, actinomycetes, myxobacteria and true bacteria but also byplants. Especially endoglucanases of a wide variety of specificitieshave been identified.

A very important industrial use of cellulytic enzymes is the use fortreatment of cellulosic textile or fabric, e.g. as ingredients indetergent compositions or fabric softener compositions, forbio-polishing of new fabric (garment finishing), and for obtaining a“stone-washed” look of cellulose-containing fabric, especially denim,and several methods for such treatment have been suggested, e.g. inGB-A-1 368 599, EP-A-0 307 564 and EP-A-0 435 876, WO 91/17243, WO91/10732, WO 91/17244, PCT/DK95/000108 and PCT/DK95/00132.

Another important industrial use of cellulytic enzymes is the use fortreatment of paper pulp, e.g. for improving the drainage or for deinkingof recycled paper.

Especially the endoglucanases (EC No. 3.2.1.4) constitute an interestinggroup of hydrolases for the mentioned industrial uses. Endoglucanasescatalyses endo hydrolysis of 1,4-β-D-glycosidic linkages in cellulose,cellulose derivatives (such as carboxy methyl cellulose and hydroxyethyl cellulose), lichenin, β-1,4 bonds in mixed β-1,3 glucans such ascereal β-D-glucans or xyloglucans and other plant material containingcellulosic parts. The authorized name is endo-1,4-β-D-glucan 4-glucanohydrolase, but the abbreviated term endoglucanase is used in the presentspecification. Reference can be made to T.-M. Enveri, “MicrobialCellulases” in W. M. Fogarty, Microbial Enzymes and Biotechnology,Applied Science Publishers, p. 183-224 (1983); Methods in Enzymology,(1988) cVol. 160, p. 200-391 (edited by Wood, W. A. and Kellogg, S. T.);Béguin, P., “Molecular Biology of Cellulose Degradation”, Annu. Rev.Microbiol. (1990), Vol. 44, pp. 219-248; Béguin, P. and Aubert, J-P.,“The biological degradation of cellulose”, FEMS Microbiology Reviews 13(1994) p.25-58; Henrissat, B., “Cellulases and their interaction withcellulose”, Cellulose (1994), Vol. 1, pp. 169-196.

Fungal endoglucanases have been described in numerous publications,especially those derived from species as e.g. Fusarium oxysporum,Trichoderma reesei, Trichoderma longibrachiatum, Aspergillus aculeatus,Neocallimastix patriciarum, and e.g. from species of the generaPiromyces, Humicola, Myceliophthora, Geotricum, Penicillium, Irpex,Coprinus.

For example, fungal endoglucanases have been described by Sheppard, P.O., et al., “The use of conserved cellulase family-specific sequences toclone Cellulase homologue cDNAs from Fusarium oxysporum, Gene, (1994),Vol. 15, pp. 163-167, Saloheimo, A., et al., “A novel, smallendoglucanase gene, egl5, from Trichoderma reesei isolated by expressionin yeast”, Molecular Microbiology (1994), Vol. 13(2), pp. 219-228; vanArsdell, J. N. et al., (1987), Cloning, characterization, and expressionin Saccharomyces cerevisiae of endoglucanase I from Trichoderma reesei,Bio/Technology 5: 60-64; Penttilä, M. et al., (1986), “Homology betweencellulase genes of Trichoderma reesei: complete nucleotide sequence ofthe endoglucanase I gene”, Gene 45:253-263; Saloheimo, M. et al, (1988),“EGIII, a new endoglucanase from Trichoderma reesei: thecharacterization of both gene and enzyme”, Gene 63:11-21; Gonzáles, R.,et al., “Cloning, sequence analysis and yeast expression of the egl1gene from Trichoderma longibrachiatum”, Appl. Microbiol. Biotechnol.,(1992), Vol. 38, pp. 370-375; Ooi, T. et al. “Cloning and sequenceanalysis of a cDNA for cellulase (FI-CMCase) from Aspergillusaculeatus”, Curr. Genet., (1990), Vol. 18, pp. 217-222; Ooi, T. et al,“Complete nucleotide sequence of a gene coding for Aspergillus aculeatuscellulase (FI-CMCase)”, Nucleic Acids Research, (1990), Vol. 18, No. 19,p. 5884; Xue, G. et al., “Cloning and expression of multiple cellulasecDNAs from the anaerobic rumen fungus Neocallimastix patriciarum in E.coli”, J. Gen. Microbiol., (1992), Vol. 138, pp. 1413-1420; Xue, G. etal., “A novel polysaccharide hydrolase cDNA (celD) from Neocallimastixpatriciarum encoding three multi-functional catalytical domains withhigh endoglucanase, cellobiohydrolase and xylanase activities”, J. Gen.Microbiol., (1992), Vol. 138, pp. 2397-2403; Zhou, L. et al.,“Intronless celB from the anaerobic fungus Neocallimastix patriciarumencodes a modular family A endoglucanase”, Biochem. J., (1994), Vol.297, pp.359-364; Dalbøge, H. and Heldt-Hansen, H. P., “A novel methodfor efficient expression cloning of fungal enzyme genes”, Mol. Gen.Genet., (1994), Vol. 243, pp. 253-260; Ali, B. R. S. et al., “Cellulasesand hemicellulases of the anaerobic fungus Piromyces constitute amultiprotein cellulose-binding complex and are encoded by multigenefamilies”, FEMS Microbiol. Lett., (1995), Vol. 125, No. 1, pp. 15-21.Further, the DNA Data Bank of Japan (DDBJ database publicly available atInternet) comprises two DNA sequences cloned from Penicilliumjanthinellum encoding endoglucanases (cloned by A. Koch and G. Mernitz,respectively) and a DNA sequence cloned from Humicola grisea var.thermoidea encoding an endoglucanase (cloned by T. Uozumi). Twoendoglucanases from Macrophomina phaseolina have been cloned andsequenced, see Wang, H. Y. and Jones, R. W.: “Cloning, characterizationand functional expression of an endoglucanase-encoding gene from thephytopathogenic fungus Macrophomina phaseolina” in Gene, 158:125-128,1995, and Wang, H. Y. and Jones, R. W.: “A unique endoglucanase-encodinggene cloned from the phytopathogenic fungus Macrophomina phaseolina” inApplied And Environmental Microbiology, 61:2004-2006, 1995. One of theseendoglucanases shows high homology to the egl3 endoglucanase from thefungus Trichoderma reesei, the other shows homology to the egl1 from themicrobial phytopathogen Pseudomonas solanacearum indicating that bothendoglucanases belong to family 5 of glycosyl hydrolases (B. Henrissat,Biochem J 280:309-316 (1991)). Filament-specific expression of acellulase gene in the dimorphic fungus Ustilago maydis is disclosed inSchauwecker, F. et al. (1995).

WO 91/17243 (Novo Nordisk A/S) discloses a cellulase preparationconsisting of a homogenous endoglucanase component immunoreactive withan antibody raised against a highly purified 43 kDa endoglucanasederived from Humicola insolens, DSM 1800; WO 91/17244 (Novo Nordisk A/S)discloses a new (hemi)cellulose degrading enzyme, such as anendoglucanase, a cellobiohydrolase or a β-glucosidase, which may bederived from fungi other than Trichoderma and Phanerochaete; WO 93/20193discloses an endoglucanase derivable from Aspergillus aculeatus; WO94/21801 (Genencor Inc.) concerns a cellulase system isolated fromTrichoderma longibrachiatum exhibiting endoglucanase activity; WO94/26880 (Gist Brocades N.V.) discloses an isolated mixture of cellulosedegrading enzymes, which preferable are obtained from Trichoderma,Aspergillus or Disporotrichum, comprising endoglucanase,cellobiohydrolase, and xyloglucanase activity; and WO 95/02043 (NovoNordisk A/S) describes an enzyme with endoglucanase activity derivedfrom Trichiderma harzianum, which can be used for a number of purposesincluding e.g. degradation or modification of plant cell walls.

It is also known that cellulases may or may not have a cellulose bindingdomain (a CBD). The CBD enhances the binding of the enzyme to acellulose-containing fiber and increases the efficacy of the catalyticactive part of the enzyme.

There is an ever existing need for providing novel cellulase enzymepreparations which may be used for applications where cellulase,preferably an endoglucanase, activity is desirable.

The object of the present invention is to provide novel enzymepreparations having substantial cellulytic activity at acid, neutral oralkaline conditions and improved performance in paper pulp processing,textile treatment, laundry processes or in animal feed; preferably novelcellulases, more preferably well-performing endoglucanases, which arecontemplated to be producible or produced by recombinant techniques.

SUMMARY OF THE INVENTION

Surprisingly, it has been found that a group of endoglucanases havingcertain unique characteristics perform very good in those industrialapplications for which endoglucanases are conventionally used. Theseunique characteristics can be described in terms of conserved regions ofthe amino acid sequence of the enzyme protein and the inventors havefound that cellulytic enzymes, i.e. enzymes exhibiting cellulyticactivity, having certain conserved regions are very effective e.g. inthe treatment of laundry, in the treatment of newly manufacturedtextile, in the treatment of papermaking pulp.

Accordingly, in its first aspect the present invention relates to anenzyme preparation consisting essentially of an enzyme having cellulyticactivity and comprising a first amino acid sequence consisting of 14amino acid residues having the following sequence

Thr Arg Xaa Xaa Asp Cys Cys Xaa Xaa Xaa Cys Xaa Trp Xaa (SEQ ID NO:79)1   2   3   4   5   6   7   8   9   10  11  12  13  14and a second amino acid sequence consisting of 5 amino acid residueshaving the following sequence

Trp Cys Cys Xaa Cys (SEQ ID NO:80) 1   2   3   4   5wherein,

-   -   at position 3 of the first sequence, the amino acid is Trp, Tyr        or Phe;    -   at position 4 of the first sequence, the amino acid is Trp, Tyr        or Phe;    -   at position 8 of the first sequence, the amino acid is Arg, Lys        or His;    -   at positions 9, 10, 12 and 14, respectively, of the first        sequence, and at position 4 of the second sequence, the amino        acid is any of the 20 naturally occurring amino acid residues        with the provisos that, in the first amino acid sequence, (i)        when the amino residue at position 12 is Ser, then the amino        acid residue at position 14 is not Ser, and (ii) when the amino        residue at position 12 is Gly, then the amino acid residue at        position 14 is not Ala.

This surprising finding of clearly recognisable conserved regions, inspite of rather prominent variations found within well-performingendoglucanase enzymes, is a result of studies of a number of fungal DNAsequences encoding for specific amino acid sequences of enzymes havingsignificant cellulytic, especially endoglucanase, activities.

Based on this finding, a novel molecular method taylored to screenspecifically for genomic DNA or cDNA characterised by encoding theenzymes of the invention has been developed. As tools for this threesets of degenerated primers were constructed. Accordingly, in its secondaspect, the invention relates to a method for providing a gene encodingfor cellulytic enzymes having the above conserved regions.

By using this method, i.e. the set of primers for a PCR screening ongenomic DNA, it was surprisingly found that DNA encoding for saidenzymes can be found from a broad range of fungi, belonging totaxonomically very different organisms and inhabiting ecologically verydifferent niches.

Further, by using this method it has been possible to find DNA sequencesencoding for the core regions (catalytically active regions or domains)of said enzymes without any attached cellulose binding domain (CBD)which core regions of enzymes would not have been selected by usingconventional performance based screening approaches. The inventors haveverified experimentally that the linking of a CBD region to a coreregion enzyme (comprising the catalytically active region or domain ofthe enzyme) of the present invention results in a significantly improvedperformance, e.g. a fifty times higher performance, of the multipledomain enzyme.

Accordingly, the present invention provides novel cellulases, especiallyendoglucanases, having improved performance in industial applications,either in their native form, or homo- or heterologously produced.

In further aspects, the present invention relates to novel cellulyticenzyme preparations which are derivable from taxonomically specificphyli, classes, orders, families, genera, and species; e.g. fromBasidiomycotous Hymenomycetes, Zygomycota, Chytridiomycota; or from theclasses Discomycetes, Loculoascomycetes, Plectomycetes;Archaeascomycetes, Hemiascomycetes or from the orders Diaportales,Xylariales, Trichosphaeriales, Phyllachorales; or from the familiesNectriaeae, Sordariaceae, Chaetomiaceae, Ceratostomaceae,Lasiosphaeriaceae; or from the genera Cylindrocarpon, Gliocladium,Volutella, Scytalidium, Acremonium, or from the species Fusariumlycopersici, Fusarium passiflora, Fusarium solani, Fusarium anguioides,Fusarium poae, Humicola nigrescens, Humicola grisea, especially suchconsisting essentially of an enzyme comprising an amino acid sequenceselected from the group consisting of the sequences (SEQ ID NOS:105-107)

Xaa Thr Arg Xaa Phe Asp Xaa 1   2   3   4   5   6   7; Xaa Thr Arg XaaTyr Asp Xaa 1   2   3   4   5   6   7; and Xaa Thr Arg Xaa Trp Asp Xaa1   2   3   4   5   6   7wherein, at position 4, Xaa is Trp, Tyr or Phe; and at positions 1 and7, Xaa is any of the 20 naturally occurring amino acid residues.

More specifically, the enzyme preparation of the invention is preferablyobtainable from the taxonomically specific phyli, classes, orders,families, genera, and species mentioned above which all produceendoglucanases comprising a first peptide consisting of 13 amino acidresidues having the following sequence

Thr Arg Xaa Xaa Asp Cys Cys Xaa Xaa Xaa Cys Xaa Trp (SEQ ID NO:108)1   2   3   4   5   6   7   8   9   10  11  12  13and a second peptide consisting of 5 amino acid residues having thefollowing sequence

Trp Cys Cys Xaa Cys (SEQ ID NO:80) 1   2   3   4   5wherein, at position 3 of the first sequence, the amino acid is Trp, Tyror Phe; at position 4 of the first sequence, the amino acid is Trp, Tyror Phe; at position 8 of the first sequence, the amino acid is Arg, Lysor His; at positions 9, 10, and 12, respectively, of the first sequence,and at position 4 of the second sequence, the amino acid is any of the20 naturally occurring amino acid residues.

In yet further aspects, the present invention provides DNA constructscomprising a DNA sequence encoding an enzyme exhibiting endoglucanaseactivity, which DNA sequence comprises the DNA sequence of SEQ ID NOS:1, 7, 9, 11, 13, 15, 21, and 25, respectively, or analogues thereof.

The present invention also relates to a recombinant expression vectorcomprising a DNA construct of the invention; to a cell comprising a DNAconstruct or a recombinant expression vector of the invention; to amethod of producing an enzyme, e.g a recombinant enzyme, of theinvention; to a method of providing colour clarification of laundry byusing the enzyme of the invention; to a laundry composition comprisingthe enzyme of the invention; to uses of the enzyme of the invention fordegradation or modification of plant material, e.g. cell walls, fortreatment of fabric, textile or garment, for treatment of paper pulp;and to an enzyme preparation which is enriched in an enzyme of thepresent invention.

THE DRAWINGS

FIG. 1 is an alignment of the deduced encoded amino acid sequences ofAcremonium sp. (I) (SEQ ID NO: 8), Volutella colletotricholdes (SEQ IDNO: 22), Crinipellis scabella (SEQ ID NO: 16), Acremonium sp. (II) (SEQID NO: 10), Myceliophthore thermophila (SEQ ID NO: 2), Thielavlaterrestris (SEQ ID NO: 12), Macrophomina phaseollna (SEQ ID NO: 14). ThePileup program (Feng and Doolittle, 1987) (GCG package, version 8.0) wasused to create the best alignment. Identical residues in at least foursequences (boxed) are indicated around the corresponding amino acids.

FIGS. 2 a, b, c illustrates the taxonomic classification within theFungal Kingdom of all the microorganisms disclosed herein as beingcapable of producing said enzyme preparations and enzymes of theinvention.

The taxonomic classification used herein builds primarily on the systemused in the NIH Data Base (Entrez, version spring 1996) available on theinternet.

Regarding classification of organisms which are not included in theEntrez data base the following generally available and world wideaccepted reference books have been used:

For Ascomycetes: Eriksson, O. E. & Hawksworth, D. L.: SystemaAscomycetum vol 12 (1993).

For Basidiomycetes: Jülich, W.: Higher Taxa of Basidiomycetes,Bibliotheca Mycologia 85, 485 pp (1981).

For Zygomycetes: O'Donnell, K.: Zygomycetes in culture, University ofGeorgia, US, 257 pp (1979).

General Mycological Reference Books

-   Hawksworth, D. L., Kirk, P. M., Sutton, B. C. and Pegler, D. N.:    Dictionary of the fungi, International Mycological Institute, 616 pp    (1995);-   Von Arx, J. A.: The genera of fungi sporulating in culture, 424 pp    (1981).

The taxonomic implacement of the genus Humicola has until recentlyremained unclear. However, studies of 18SRNA of a wide selection ofSordariales has given strong indications of referring Humicola to theorder Sordariales (Taylor, Clausen & Oxenboll, unpublished). Furtherthese data suggests Humicola along with Scytalidium to be only ratherdistantly related to the families Sordariaceae, Chaetomiaceae,Ceratostomataceae, and Lasiosphaeriaceae. In accordance with the aboveHumicola and Scytalidium are here placed within the order Sordariales,with unclassified Family.

FIG. 3 is an alignment of the deduced partial amino acid sequencesderived from a selection of 26 of the 46 microorganisms described inExample 5(SEQ ID NOS: 40, 30, 38, 74, 64, 32, 52, 62, 66, 28, 34, 68,76, 72, 46, 54, 42, 36, 48, 44, 78, 58, 50, 60, and 56).

DETAILED DESCRIPTION OF THE INVENTION

In the present context, the term “the 20 naturally occuring amino acidresidues” denotes the 20 amino acid residues usually found in proteinsand conventionally known as alanine (Ala or A), valine (Val or V),leucine (Leu or L), isoleucine (Ile or I), proline (Pro or P),phenylalanine (Phe or F), tryptophan (Trp or W), methionine (Met or M),glycine (Gly or G), serine (Ser or S), threonine (Thr or T), cysteine(Cys or C), tyrosine (Tyr or Y), asparagine (Asn or N), glutamine (Ginor Q), aspartic acid (Asp or D), glutamic acid (Glu or E), lysine (Lysor K), arginine (Arg or R), and histidine (His or H).

According to the present invention there is provided novelwell-performing endoglucanases comprising conserved amino acid sequenceregions, especially a first amino acid sequence consisting of 14 aminoacid residues having the following sequence

Thr Arg Xaa Xaa Asp Cys Cys Xaa Xaa Xaa Cys Xaa Trp Xaa (SEQ ID NO:79)1   2   3   4   5   6   7   8   9   10  11  12  13  14and a second amino acid sequence consisting of 5 amino acid residueshaving the following sequence

Trp Cys Cys Xaa Cys (SEQ ID NO:80) 1   2   3   4   5wherein,

-   -   at position 3 of the first sequence, the amino acid is Trp, Tyr        or Phe;    -   at position 4 of the first sequence, the amino acid is Trp, Tyr        or Phe;    -   at position 8 of the first sequence, the amino acid is Arg, Lys        or His;    -   at positions 9, 10, 12 and 14, respectively, of the first        sequence, and at position 4 of the second sequence, the amino        acid is any of the 20 naturally occurring amino acid residues        with the provisos that, in the first amino acid sequence, (i)        when the amino residue at position 12 is Ser, then the amino        acid residue at position 14 is not Ser, and (ii) when the amino        residue at position 12 is Gly, then the amino acid residue at        position 14 is not Ala.

Preferably, the enzyme of the invention is of microbial origin, i.e.obtainable from a microorganism such as a fungus.

In a preferred embodiment, the amino acid residue at position 9 of thefirst sequence is selected from the group consisting of proline,threonine, valine, alanine, leucine, isoleucine, phenylalanine, glycine,cysteine, asparagine, glutamine, tyrosine, serine, methionine andtryptophan, preferably from the group consisting of proline andthreonine.

In another preferred embodiment, the amino acid residue at position 10of the first sequence is selected from the group consisting of proline,threonine, valine, alanine, leucine, isoleucine, phenylalanine, glycine,cysteine, asparagine, glutamine, tyrosine, serine, methionine andtryptophan, preferably serine.

In yet another preferred embodiment, the amino acid residue at position12 of the first sequence is selected from the group consisting ofproline, threonine, valine, alanine, leucine, isoleucine, phenylalanine,glycine, cysteine, asparagine, glutamine, tyrosine, serine, methionineand tryptophan, preferably from the group consisting of alanine andglycine.

In yet another preferred embodiment, the amino acid residue at position14 of the first sequence is selected from the group consisting ofproline, threonine, valine, alanine, leucine, isoleucine, phenylalanine,glycine, cysteine, asparagine, glutamine, tyrosine, serine, methionine,tryptophan, glutamic acid and aspartic acid, preferably from the groupconsisting of proline, threonine, serine, alanine, glutamic acid andaspartic acid.

Preferably, the amino acid residue at position 4 of the second sequenceis selected from the group consisting of proline, threonine, valine,alanine, leucine, isoleucine, phenylalanine, glycine, cysteine,asparagine, glutamine, tyrosine, serine, methionine, tryptophan,glutamic acid and aspartic acid, more preferably from the groupconsisting of alanine, glycine, and glutamine.

Examples of more preferred embodiments are such wherein, in the firstsequence, the amino acid residue at position 3 is tyrosine; or the aminoacid residue at position 4 is tryptophan; or the amino acid residue atposition 8 is lysine.

In an especially preferred embodiment, the enzyme of the invention has afirst sequence comprising the amino acid sequence

Thr Arg Tyr Trp Asp Cys Cys Lys Pro Ser Cys Ala Trp (SEQ ID NO:79)1   2   3   4   5   6   7   8   9   10  11  12  13,or the amino acid sequence

Thr Arg Tyr Trp Asp Cys Cys Lys Thr Ser Cys Ala Trp (SEQ ID NO:79)1   2   3   4   5   6   7   8   9   10  11  12  13,or the amino acid sequence

Thr Arg Tyr Trp Asp Cys Cys Lys Pro Ser Cys Gly Trp (SEQ ID NO:79)1   2   3   4   5   6   7   8   9   10  11  12  13.

In a second aspect, the present invention provides a method forproviding a microbial strain comprising a gene encoding such an enzymewhich method comprises hybridization, e.g. PCR amplification, understandard conditions with an oligonucleotide derived from any of theconserved regions, illustrated in FIG. 1.

A useful oligonucleotide comprises a nucleotide sequence encoding atleast a pentapeptide comprised in a peptide selected from the groupconsisting of a.

Thr Arg Xaa Xaa Asp Cys Cys Xaa Xaa Xaa Cys Xaa Trp Xaa (SEQ ID NO:79)1   2   3   4   5   6   7   8   9   10  11  12  13  14the amino acid at position 3 or 4 being Trp, Tyr or Phe;the amino acid in position 8 being Arg, Lys or His;the amino acid at positions 9, 10, 12 and 14, respectively, being any ofthe 20 naturally occurring amino acid residues; and b.

Trp Cys Cys Xaa Cys Tyr (SEQ ID NO:81) 1   2   3   4   5   6the amino acid at position 4 being any of the 20 naturally occurringamino acid residues; and c.

Xaa Pro Gly Gly Gly Xaa Gly Xaa Phe (SEQ ID NO:82)1   2   3   4   5   6   7   8   9the amino acid at position 1 being Met or Ile;the amino acid at positions 6 and 8, respectively, is Leu, Ile or VaI;and d.

Gly Cys Xaa Xaa Arg Xaa Asp Trp Xaa (SEQ ID NO:83)1   2   3   4   5   6   7   8   9the amino acid at position 3 being any of the 20 naturally occurringamino acid residues;the amino acid at positions 4 and 6, respectively, being Trp, Tyr orPhe; andthe amino acid at position 9 being Phe or Mel;

The useful oligonucleotides also comprises nucleotide sequencescomplementary to the sequences mentioned.

In a preferred embodiment of the method of the invention, theoligonucleotide corresponds to a PCR primer selected from the PCRprimers

sense:5′-CCCCAAGCTTACAI^(A)/_(C)GITA^(C)/_(T)TGGGA^(C)/_(T)TG^(C)/_(T)TG^(C)/_(T)AA^(A)/_(G)^(A)/_(C)C-3′ (SEQ ID NO:84) antisense 1:5′-CTAGTCTAGATA^(A)/_(G)CAIGC^(A)/_(G)CA^(A)/_(G)CACC-3′ (SEQ ID NO:85);antisense 2:CTAGTCTAGAAAIA^(A)/_(G)/^(T)ICCIA^(A)/^(C)/^(G)ICCICCICCIGG-3′ (SEQ IDNO:86); antisense 3: 5′-CTAGTCTAGAIAACCA^(A)/_(G)TCA^(A)/_(G)^(A)/_(T)AIC^(G)/_(T)CC-3 (SEQ ID NO:87).

In a third aspect, the present invention provides an enzyme preparationwhich essentially consists of an enzyme having cellulytic activity andhaving the conserved regions found by the inventors, i.e. whichcomprises a peptide consisting of 7 amino acid residues having thefollowing sequence (SEQ ID NOS: 105-107)

Xaa Thr Arg Xaa Phe Asp Xaa 1   2   3   4   5   6   7; Xaa Thr Arg XaaTyr Asp Xaa 1   2   3   4   5   6   7; and Xaa Thr Arg Xaa Trp Asp Xaa1   2   3   4   5   6   7wherein, at position 4, Xaa is Trp, Tyr or Phe; and at positions 1 and7, Xaa is any of the 20 naturally occurring amino acid residues.

This enzyme is obtainable from a strain belonging to BasidiomycotousHymenomycetes (see FIG. 2), more preferably to the group consisting ofthe orders Agaricales, Auriculariales, and Aphyllophorales, even morepreferably to the group consisting of the families Exidiaceae,Tricholomataceae, Coprinaceae, Schizophyllaceae, Bjerkanderaceae andPolyporaceae, especially to the group consisting of the genera Exidia,Crinipellis, Fomes, Panaeolus, Trametes, Schizophyllum, andSpongipellis.

Specific examples are endoglucanases obtainable from a strain belongingto the group consisting of the species Exidia glandulosa, Crinipellisscabella, Fomes fomentarius, and Spongipellis sp., more specificexamples being Exidia glandulosa, CBS 277.96, Crinipellis scabella, CBS280.96, Fomes fomentarius, CBS 276.96, and Spongipellis sp., CBS 283.96.

Exidia glandulosa was deposited at Centraalbureau voor Schimmelcultures,Oosterstraat 1, Postbus 273, NL-3740 AG Baam, the Netherlands, on 12Mar. 1996, under the deposition number CBS 277.96; Crinipellis scabellawas deposited at Centraalbureau voor Schimmelcultures on 12 Mar. 1996,under the deposition number CBS 280.96, Fomes fomentarius was depositedat Centraalbureau voor Schimmelcultures on 12 Mar. 1996, under thedeposition number CBS 276.96, and Spongipellis sp. was deposited atCentraalbureau voor Schimmelcultures on 12 Mar. 1996, under thedeposition number CBS 283.96; all deposited under the Budapest Treaty.

The enzyme preparation of the invention is also obtainable from a strainbelonging to Chytridiomycota, preferably from a strain belonging to theclass of Chytridiomycetes, more preferably belonging to the groupconsisting of the order Spizellomycetales, even more preferably to thefamily Spizellomycetaceae, especially belonging to the genusRhizophlyctis. A specific example is a strain belonging to the speciesRhizophlyctis rosea, more specifically to Rhizophlyctis rosea, CBS282.96.

Rhizophlyctis rosea was deposited at Centraalbureau voorSchimmelcultures on 12 Mar. 1996, under the deposition number CBS282.96; under the Budapest Treaty.

The enzyme preparation of the invention is also obtainable from a strainbelonging to Zygomycota, preferably belonging to the class Zygomycetes,more preferably to the order Mucorales, even more preferably to thegroup of families consisting of Mucoraceae and Thamnidiaceae, especiallybelonging to the group consisting of the genera Rhizomucor, Phycomycesand Chaetostylum. Specific examples are strains belonging to the generaRhizomucor pusillus, Phycomyces nitens, and Chaetostylum fresenii morespecifically to Rhizomucor pusillus, IFO 4578, and Phycomyces nitens,IFO 4814 and Chaetostylum fresenii, NRRL 2305.

Further, the enzyme preparation of the invention is also obtainable froma strain belonging to the group consisting of Archaeascomycetes,Discomycetes, Hemiascomycetes, Loculoascomycetes, and Plectomycetes,preferably belonging to the group consisting of the orders Pezizales,Rhytismatales, Dothideales, and Eurotiales. Especially, the enzyme isobtainable from a strain belonging the the group consisting of thefamilies Cucurbitariaceae, Ascobolaceae, Rhytismataceae, andTrichocomaceae, preferably belonging the the group consisting of thegenera Diplodia, Microsphaeropsis, Ulospora, Macrophomina, Ascobolus,Saccobolus, Penicillium, and Thermomyces. Specific examples are enzymesobtainable from a strain belonging the the group consisting of thespecies Diplodia gossypina, Microsphaeropsis sp., Ulospora bilgramii,Aureobasidium sp., Macrophomina phaseolina, Ascobolus stictoides,Saccobolus dilutellus, Peziza, Penicillium verruculosum, Penicilliumchrysogenum, and Thermomyces verrucosus; more specifically Diplodiagossypina, CBS 274.96, Ulospora bilgramii, NKBC 1444, Macrophominaphaseolina, CBS 281.96, Saccobolus dilutellus, CBS 275.96, Penicilliumverruculosum, ATCC 62396, Penicillium chrysogenum, ATCC 9480, andThermomyces verrucosus, CBS 285.96.

Diplodia gossypina was deposited at Centraalbureau voor Schimmelcultureson 12 Mar. 1996, under the deposition number CBS 274.96, Macrophominaphaseolina was deposited at Centraalbureau voor Schimmelcultures on 12Mar. 1996, under the deposition number CBS 281.96, Saccobolus dilutelluswas deposited at Centraalbureau voor Schimmelcultures on 12 Mar. 1996,under the deposition number CBS 275.96; Thermomyces verrucosus wasdeposited at Centraalbureau voor Schimmelcultures on 12 Mar. 1996, underthe deposition number CBS 285.96; all under the Budapest Treaty.

Yet further, the enzyme is obtainable from a strain belonging to thegroup consisting of the orders Diaportales, Xylariales,Trichosphaeriales and Phyllachorales, preferably from a strain belongingto the group consisting of the families Xylariaceae, Valsaceae, andPhyllachoraceae, more preferably belonging to the genera Diaporthe,Colletotrichum, Nigrospora, Xylaria, Nodulisporum and Poronia. Specificexamples are the species Diaporthe syngenesia, Colletotrichumlagenarium, Xylaria hypoxylon, Nigrospora sp., Nodulisporum sp., andPoronia punctata, more specifically Diaporthe syngenesia, CBS 278.96,Colletotrichum lagenarium, ATCC 52609, Nigrospora sp., CBS 272.96,Xylaria hypoxylon, CBS 284.96.

Diaporthe syngenesia was deposited at Centraalbureau voorSchimmelcultures on 12 Mar. 1996, under the deposition number CBS278.96, Nigrospora sp. was deposited at Centraalbureau voorSchimmelcultures on 12 Mar. 1996, under the deposition number CBS272.96, Xylaria hypoxylon was deposited at Centraalbureau voorSchimmelcultures on 12 Mar. 1996, under the deposition number CBS284.96; all under the Budapest Treaty.

The enzyme is also obtainable from the unidentified fungal, mitosporic,coleomycetous deposited at Centraalbureau voor Schimmelcultures on 12Mar. 1996, under the deposition numbers CBS 270.96, CBS 271.96 and CBS273.96, respectively, under the Budapest Treaty.

The enzyme is also obtainable from a strain belonging to the groupconsisting of the genera Cylindrocarpon, Gliocladium, Nectria,Volutella, Sordaria, Scytalidium, Thielavia, Syspastospora,Cladorrhinum, Chaetomium, Myceliphthora and Acremonium, especially froma strain belonging to the group consisting of the species Cylindrocarponsp., Nectria pinea, Volutella colletotrichoides, Sordaria fimicola,Sordaria macrospora, Thielavia terrestris, Thielavia thermophila,Syspastospora boninensis, Cladorrhinum foecundissimum, Chaetomiummurorum, Chaetomium virescens, Chaetomium brasiliensis, Chaetomiumcunicolorum, Myceliophthora thermophila, Gliocladium catenulatum,Scytalidium thermophila, and Acremonium sp., more specifically fromNectria pinea, CBS 279.96, Volutella colletotrichoides, CBS 400.58,Sordaria fimicola, ATCC 52644, Sordaria macrospora, ATCC 60255,Thielavia terrestris, NRRL 8126, Thielavia thermophila, CCBS 174.70,Chaetomium murorum, CBS 163.52, Chaetomium virescens, CBS 547.75,Chaetomium brasiliensis, CBS 122.65, Chaetomium cunicolorum, CBS 799.83,Syspastospora boninensis, NKBC 1515, Cladorrhinum foecundissimum, ATCC62373, Myceliophthora thermophila, CBS 117.65, Scytalidium thermophila,ATCC 28085, Gliocladium catenulatum, ATCC 10523, and Acremonium sp., CBS478.94.

Nectria pinea was deposited at Centraalbureau voor Schimmelcultures on12 Mar. 1996, under the deposition number CBS 279.96, and Acremonium sp.was deposited on 28 Sep. 1994 under the deposition number CBS 478.94,both according to the Budapest Treaty.

The enzyme is also obtainable from a strain belonging to the groupconsisting of the species Fusarium solani, Fusarium anguioides, Fusariumpoae, Fusarium oxysporum ssp. lycopersici, Fusarium oxysporum ssp.passiflora, Humicola nigrescens and Humicola grisea, especially Fusariumoxysporum ssp lycopersici, CBS 645.78, Fusarium oxysporum ssppassiflora, CBS 744.79, Fusarium solani, IMI 107.511, Fusariumanguioides, IFO 4467, Fusarium poae, ATCC 60883, Humicola nigrescens,CBS 819.73 and Humicola grisea, ATCC 22726. It is to be noted thatHumicola grisea is different from Humicola grisea var. thermoidea.

In a preferred embodiment, the enzyme preparation of the invention isderived from the disclosed classes, orders, families, genera and speciesand essentially consists of an enzyme comprising a first peptideconsisting of 13 amino acid residues having the following sequence

Thr Arg Xaa Xaa Asp Cys Cys Xaa Xaa Xaa Cys Xaa Trp (SEQ ID NO:79)1   2   3   4   5   6   7   8   9   10  11  12  13and a second peptide consisting of 5 amino acid residues having thefollowing sequence

Trp Cys Cys Xaa Cys (SEQ ID NO:80) 1   2   3   4   5wherein, at position 3 of the first sequence, the amino acid is Trp, Tyror Phe; at position 4 of the first sequence, the amino acid is Trp, Tyror Phe; at position 8 of the first sequence, the amino acid is Arg, Lysor His; at positions 9, 10, and 12, respectively, of the first sequence,and at position 4 of the second sequence, the amino acid is any of the20 naturally occurring amino acid residues.

Preferably, the amino acid residue at position 9 of the first sequenceis selected from the group consisting of proline, threonine, valine,alanine, leucine, isoleucine, phenylalanine, glycine, cysteine,asparagine, glutamine, tyrosine, serine, methionine and tryptophan, morepreferably from the group consisting of proline and threonine; the aminoacid residue at position 10 of the first sequence which is selected fromthe group consisting of proline, threonine, valine, alanine, leucine,isoleucine, phenylalanine, glycine, cysteine, asparagine, glutamine,tyrosine, serine, methionine and tryptophan, preferably serine; theamino acid residue at position 12 of the first sequence is selected fromthe group consisting of proline, threonine, valine, alanine, leucine,isoleucine, phenylalanine, glycine, cysteine, asparagine, glutamine,tyrosine, serine, methionine and tryptophan, preferably from the groupconsisting of alanine and glycine; and the amino acid residue atposition 4 of the second sequence is selected from the group consistingof proline, threonine, valine, alanine, leucine, isoleucine,phenylalanine, glycine, cysteine, asparagine, glutamine, tyrosine,serine, methionine, tryptophan, glutamic acid and aspartic acid, morepreferably from the group consisting of alanine, glycine, and glutamine.

In further aspects, the present invention provides a DNA constructcomprising a DNA sequence encoding an enzyme exhibiting endoglucanaseactivity, which DNA sequence comprises

a) the DNA sequence of SEQ ID NO: 1, 7, 9, 11, 13, 15, 21, or 25,respectively, or the DNA sequence obtainable from the plasmid inSaccharomyces cerevisiae DSM 9770, DSM 10082, DSM 10080, DSM 10081,Escherichia coli, DSM 10512, DSM 10511, DSM 10571, DSM 10576,respectively; or

b) an analogue of the DNA sequence of SEQ ID NO: 1, 7, 9, 11, 13, 15,21, or 25, respectively, or the DNA sequence obtainable from the plasmidin Saccharomyces cerevisiae DSM 9770, DSM 10082, DSM 10080, DSM 10081,Escherichia coli, DSM 10512, DSM 10511, DSM 10571, DSM 10576,respectively, which

i) is homologous with the DNA sequence of SEQ ID NO: 1, 7, 9, 11, 13,15, 21, or 25, respectively, or the DNA sequence obtainable from theplasmid in Saccharomyces cerevisiae DSM 9770, DSM 10082, DSM 10080, DSM10081, Escherichia coli, DSM 10512, DSM 10511, DSM 10571, DSM 10576,respectively,

ii) hybridizes with the same oligonucleotide probe as the DNA sequenceof SEQ ID NO: 1, 7, 9, 11, 13, 15, 21, or 25 respectively, or the DNAsequence obtainable from the plasmid in Saccharomyces cerevisiae DSM9770, DSM 10082, DSM 10080, DSM 10081, Escherichia coli, DSM 10512, DSM10511, DSM 10571, DSM 10576, respectively,

iii) encodes a polypeptide which is homologous with the polypeptideencoded by a DNA sequence comprising the DNA sequence of SEQ ID NO: 1,7, 9, 11, 13, 15, 21, or 25 respectively, or the DNA sequence obtainablefrom the plasmid in Saccharomyces cerevisiae DSM 9770, DSM 10082, DSM10080, DSM 10081, Escherichia coli, DSM 10512, DSM 10511, DSM 10571, DSM10576, respectively,

iv) encodes a polypeptide which is immunologically reactive with anantibody raised against the purified endoglucanase encoded by the DNAsequence of SEQ ID NO: 1, 7, 9, 11, 13, 15, 21, or 25, respectively, orthe DNA sequence obtainable from the plasmid in Saccharomyces cerevisiaeDSM 9770, DSM 10082, DSM 10080, DSM 10081, Escherichia coli, DSM 10512,DSM 10511, DSM 10571, DSM 10576, respectively.

Escherichia coli DSM 10512 was deposited under the Budapest Treaty on 2Feb. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZellkulturen GmbH, Mascheroder Weg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10511 was deposited under the Budapest Treaty on 2Feb. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZellkulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10571 was deposited under the Budapest Treaty on 6Mar. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZelikulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10576 was deposited under the Budapest Treaty on 12Mar. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZellkulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10583 was deposited under the Budapest Treaty on 13Mar. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZelikulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10584 was deposited under the Budapest Treaty on 13Mar. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZelikulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10585 was deposited under the Budapest Treaty on 13Mar. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZelikulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10586 was deposited under the Budapest Treaty on 13Mar. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZellkulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10587 was deposited under the Budapest Treaty on 13Mar. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZelikulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Escherichia coli DSM 10588 was deposited under the Budapest Treaty on 13Mar. 1996, at DSM (Deutsche Sammlung von Mikroorganismen undZelikulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig, Germany).

Saccharomyces cerevisiae DSM 9770 was deposited under the BudapestTreaty on 24 Feb. 1995, at DSM (Deutsche Sammlung von Mikroorganismenund Zelikulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig,Germany).

Saccharomyces cerevisiae DSM 10082 was deposited under the BudapestTreaty on 30 Jun. 1995, at DSM (Deutsche Sammlung von Mikroorganismenund Zellkulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig,Germany).

Saccharomyces cerevisiae DSM 10080 was deposited under the BudapestTreaty on 30 Jun. 1995, at DSM (Deutsche Sammlung von Mikroorganismenund Zelikulturen GmbH, MascheroderWeg 16, D-38124 Braunschweig,Germany).

Saccharomyces cerevisiae DSM 10081 was deposited under the BudapestTreaty on 30 Jun. 1995, at DSM (Deutsche Sammlung von Mikroorganismenund Zelikulturen GmbH, Mascheroder Weg 16, D-38124 Braunschweig,Germany).

The DNA construct of the invention relating to SEQ ID NO: 1 can beisolated from or produced on the basis of a DNA library of a strain ofMyceliophthora, in particular a strain of M. thermophila, especially M.thermophila, CBS 117.65.

The DNA constructs of the invention relating to SEQ ID NOS: 7 and 9 canbe isolated from or produced on the basis of a DNA library of a strainof Acremonium, especially Acremonium sp., CBS 478.94.

The DNA construct of the invention relating to SEQ ID NO: 11 can beisolated from or produced on the basis of a DNA library of a strain ofThielavia in particular a strain of Thielavia terrestris, especiallyThielavia terrestris, NRRL 8126.

The DNA construct of the invention relating to SEQ ID NO: 13 can beisolated from or produced on the basis of a DNA library of a strain ofMacrophomina, in particular a strain of M. phaseolina, especially M.phaseolina, CBS 281.96.

The DNA construct of the invention relating to SEQ ID NO: 15 can beisolated from or produced on the basis of a DNA library of a strain ofCrinipellis, in particular a strain of C. scabella, especially C.scabella, CBS 280.96.

The DNA construct of the invention relating to SEQ ID NO: 25 can beisolated from or produced on the basis of a DNA library of a strain ofSordaria, in particular a strain of Sordaria fimicola.

In the present context, the “analogue” of the DNA sequence of SEQ ID NO:1, 7, 9, 11, 13, 15, 21, or 25, respectively, is intended to indicateany DNA sequence encoding an enzyme exhibiting endoglucanase activity,which has any or all of the properties i)-iv). The analogous DNAsequence

a) may be isolated from another or related (e.g. the same) organismproducing the enzyme with endoglucanase activity on the basis of the DNAsequence of SEQ ID NO: 1, 7, 9, 11, 13, 15, 21, or 25, respectively,e.g. using the procedures described herein; the homologue may be anallelic variant of the DNA sequence comprising the DNA sequences shownherein, i.e. an alternative form of a gene that arises through mutation;mutations can be silent (no change in the encoded enzyme) or may encodeenzymes having altered amino acid sequence; the homologue of the presentDNA sequence may also be a genus or species homologue, i.e. encoding anenzyme with a similar activity derived from another species,

b) may be constructed on the basis of the DNA sequences of SEQ ID NO: 1,7, 9, 11, 13, 15, 21, or 25, respectively, e.g. by introduction ofnucleotide substitutions which do not give rise to another amino acidsequence of the endoglucanase encoded by the DNA sequence, but whichcorrespond to the codon usage of the host organism intended forproduction of the enzyme, or by introduction of nucleotide substitutionswhich may give rise to a different amino acid sequence. However, in thelatter case amino acid changes are preferably of a minor nature, that isconservative amino acid substitutions that do not significantly affectthe folding or activity of the protein, small deletions, typically ofone to about 30 amino acids; small amino- or carboxyl-terminalextensions, such as an amino-terminal methionine residue, a small linkerpeptide of up to about 20-25 residues, or a small extension thatfacilitates purification, such as a poly-histidine tract, an antigenicepitope or a binding domain. See in general Ford et al., ProteinExpression and Purification 2: 95-107, 1991. Examples of conservativesubstitutions are within the group of basic amino acids (such asarginine, lysine, histidine), acidic amino acids (such as glutamic acidand aspartic acid), polar amino acids (such as glutamine andasparagine), hydrophobic amino acids (such as leucine, isoleucine,valine), aromatic amino acids (such as phenylalanine, tryptophan,tyrosine) and small amino acids (such as glycine, alanine, serine,threonine, methionine).

It will be apparent to persons skilled in the art that suchsubstitutions can be made outside the regions critical to the functionof the molecule and still result in an active polypeptide. Amino acidsessential to the activity of the polypeptide encoded by the DNAconstruct of the invention, and therefore preferably not subject tosubstitution, may be identified according to procedures known in theart, such as site-directed mutagenesis or alanine-scanning mutagenesis(Cunningham and Wells, Science 244, 1081-1085, 1989). In the lattertechnique mutations are introduced at every residue in the molecule, andthe resultant mutant molecules are tested for biological (i.e.endoglucanase) activity to identify amino acid residues that arecritical to the activity of the molecule. Sites of substrate-enzymeinteraction can also be determined by analysis of crystal structure asdetermined by such techniques as nuclear magnetic resonance,crystallography or photoaffinity labeling. See, for example, de Vos etal., Science 255: 306-312, 1992; Smith et al., J. Mol. Biol. 224:899-904, 1992; Wlodaver et al., FEBS Lett. 309: 59-64, 1992.

The endoglucanase encoded by the DNA sequence of the DNA construct ofthe invention may comprise a cellulose binding domain (CBD) existing asan integral part of the encoded enzyme, or a CBD from another origin maybe introduced into the endoglucanase enzyme thus creating an enzymehybride. In this context, the term “cellulose-binding domain” isintended to be understood as defined by Peter Tomme et al.“Cellulose-Binding Domains: Classification and Properties” in “EnzymaticDegradation of Insoluble Carbohydrates”, John N. Saddler and Michael H.Penner (Eds.), ACS Symposium Series, No. 618, 1996. This definitionclassifies more than 120 cellulose-binding domains (CBDs) into 10families (I-X), and it demonstrates that CBDs are found in variousenzymes such as cellulases, xylanases, mannanases, arabinofuranosidases,acetyl esterases and chitinases. CBDs have also been found in algae,e.g., the red alga Porphyra purpurea as a non-hydrolyticpolysaccharide-binding protein, for reference see Peter Tomme et al.,supra. However, most of the CBDs are from cellulases and xylanases. CBDsare found at the N or C termini of proteins or are internal. Enzymehybrids are known in the art, see e.g. WO 90/00609 and WO 95/16782, andmay be prepared by transforming into a host cell a DNA constructcomprising at least a fragment of DNA encoding the cellulose-bindingdomain ligated, with or without a linker, to a DNA sequence encoding theenzyme of interest and growing the host cell to express the fused gene.Enzyme hybrids may be described by the following formula:CBD—MR—X,wherein CBD is the N-terminal or the C-terminal region of an amino acidsequence corresponding to at least the cellulose-binding domain; MR isthe middle region (the linker), and may be a bond, or a short linkinggroup preferably of from about 2 to about 100 carbon atoms, morepreferably of from 2 to 40 carbon atoms; or is preferably from about 2to about 100 amino acids, more preferably of from 2 to 40 amino acids;and X is an N-terminal or C-terminal region of a polypeptide encoded bythe DNA sequence of the invention.

The homology referred to in i) above is determined as the degree ofidentity between the two sequences indicating a derivation of the firstsequence from the second. The homology may suitably be determined bymeans of computer programs known in the art such as GAP provided in theGCG progrom package (Needleman, S. B. and Wunsch, C. D., Journal ofMolecular Biology, 48: 443-453, 1970). Using GAP with the followingsettings for DNA sequence comparison: GAP creation penalty of 5.0 andGAP extension penalty of 0.3, the coding region of the DNA sequenceexhibits a degree of identity preferably of at least 60%, morepreferably at least 65%, more preferably at least 70%, even morepreferably at least 80%, especially at least 90%, with the coding regionof the DNA sequence of SEQ ID NO: 1, 7, 9, 11, 13, 15, or 21 ,respectively, or the DNA sequence obtainable from the plasmid inSaccharomyces cerevisiae, DSM 9770, DSM 10082, DSM 10080, DSM 10081,Escherichia coil, DSM 10512, DSM 10511, DSM 10571, or DSM 10576,respectively.

The hybridization referred to in ii) above is intended to indicate thatthe analogous DNA sequence hybridizes to the same probe as the DNAsequence encoding the endoglucanase enzyme under certain specifiedconditions which are described in detail in the Materials and Methodssection hereinafter. The oligonucleotide probe to be used is the DNAsequence corresponding to the endoglucanase encoding part of the DNAsequence of SEQ ID NO: 1, 7, 9, 11, 13, 15 or 21, respectively, or theDNA sequence obtainable from the plasmid in Saccharomyces cerevisiae,DSM 9770, DSM 10082, DSM 10080, DSM 10081, Escherichia coli, DSM 10512,DSM 10511, DSM 10571 or DSM 10576, respectively.

The homology referred to in iii) above is determined as the degree ofidentity between the two sequences indicating a derivation of the firstsequence from the second. The homology may suitably be determined bymeans of computer programs known in the art such as GAP provided in theGCG program package (Needleman, S. B. and Wunsch, C. D., Journal ofMolecular Biology, 48: 443-453, 1970). Using GAP with the followingsettings for polypeptide sequence comparison: GAP creation penalty of3.0 and GAP extension penalty of 0.1, the polypeptide encoded by ananalogous DNA sequence exhibits a degree of identity preferably of atleast 55%, more preferably at least 60%, more preferably at least 65%,even more preferably at least 70%, more preferably at least 80%,especially at least 90%, with the enzyme encoded by a DNA constructcomprising the DNA sequence of SEQ ID NO: 1, 7, 9, 11, 13, 15, 21, or25, respectively, or the DNA sequence obtainable from the plasmid inSaccharomyces cerevisiae, DSM 9770, DSM 10082, DSM 10080, DSM 10081,Escherichia coli, DSM 10512, DSM 10511, DSM 10571 or DSM 10576,respectively.

In connection with property iv) above it is intended to indicate anendoglucanase encoded by a DNA sequence isolated from strainSaccharomyces cerevisiae, DSM 9770, DSM 10082, DSM 10080, DSM 10081,Escherichia coli, DSM 10512, DSM 10511, DSM 10571 or DSM 10576,respectively, and produced in a host organism transformed with said DNAsequence or the corresponding endoglucanase naturally produced byMyceliophthora thermophila, Acremonium sp., Thielavia terrestris,Macrophomina phaseolina, Crinipellis scabella, Volutellacolletotrichoides, or Sordaria fimicola, respectively. The immunologicalreactivity may be determined by the method described in the Materialsand Methods section below.

In further aspects the invention relates to an expression vectorharbouring a DNA construct of the invention, a cell comprising the DNAconstruct or expression vector and a method of producing an enzymeexhibiting endoglucanase activity which method comprises culturing saidcell under conditions permitting the production of the enzyme, andrecovering the enzyme from the culture.

In a still further aspect the invention relates to an enzyme exhibitingendoglucanase activity, which enzyme

a) is encoded by a DNA construct of the invention

b) produced by the method of the invention, and/or

c) is immunologically reactive with an antibody raised against apurified endoglucanase encoded by the DNA sequence of SEQ ID NO: 1, 7,9, 11, 13, 15, or 21, respectively, or the DNA sequence obtainable fromthe plasmid in Saccharomyces cerevisiae, DSM 9770, DSM 10082, DSM 10080,DSM 10081, Escherichia coli, DSM 10512, DSM 10511, DSM 10571 or DSM10576, respectively.

The endoglucanase mentioned in c) above may be encoded by the DNAsequence isolated from the strain Saccharomyces cerevisiae, DSM 9770,DSM 10082, DSM 10080, DSM 10081, Escherichia coli, DSM 10512, DSM 10511,DSM 10571 or DSM 10576, respectively, and produced in a host organismtransformed with said DNA sequence or the corresponding endoglucanasenaturally produced by Myceliophthora thermophila, Acremonium sp.,Thielavia terrestris, Macrophomina phaseolina, Crinipellis scabella,Volutella colletotrichoides or Sordaria fimicola, respectively.

Generally, in the present context the term “enzyme” is understood toinclude a mature protein or a precursor form thereof as well to afunctional fragment thereof which essentially has the activity of thefull-length enzyme. Furthermore, the term “enzyme” is intended toinclude homologues of said enzyme.

Homologues of the present enzyme may have one or more amino acidsubstitutions, deletions or additions. These changes are preferably of aminor nature, that is conservative amino acid substitutions that do notsignificantly affect the folding or activity of the protein, smalldeletions, typically of one to about 30 amino acids; small amino- orcarboxyl-terminal extensions, such as an amino-terminal methionineresidue, a small linker peptide of up to about 20-25 residues, or asmall extension that facilitates purification, such as a poly-histidinetract, an antigenic epitope or a binding domain. See in general Ford etal., Protein Expression and Purification 2: 95-107, 1991. Examples ofconservative substitutions are within the group of basic amino acids(such as arginine, lysine, histidine), acidic amino acids (such asglutamic acid and aspartic acid), polar amino acids (such as glutamineand asparagine), hydrophobic amino acids (such as leucine, isoleucine,valine), aromatic amino acids (such as phenylalanine, tryptophan,tyrosine) and small amino acids (such as glycine, alanine, serine,threonine, methionine).

It will be apparent to persons skilled in the art that suchsubstitutions can be made outside the regions critical to the functionof the molecule and still result in an active enzyme. Amino acidsessential to the activity of the enzyme of the invention, and thereforepreferably not subject to substitution, may be identified according toprocedures known in the art, such as site-directed mutagenesis oralanine-scanning mutagenesis (Cunningham, 1989). In the latter techniquemutations are introduced at every residue in the molecule, and theresultant mutant molecules are tested for cellulytic activity toidentify amino acid residues that are critical to the activity of themolecule. Sites of ligand-receptor interaction can also be determined byanalysis of crystal structure as determined by such techniques asnuclear magnetic resonance, crystallography or photoaffinity labelling.See, for example, de Vos et al., 1992; Smith et al., 1992, Wlodaver etal., 1992.

The homologue may be an allelic variant, i.e. an alternative form of agene that arises through mutation, or an altered enzyme encoded by themutated gene, but having substantially the same activity as the enzymeof the invention. Hence mutations can be silent (no change in theencoded enzyme) or may encode enzymes having altered amino acidsequence.

The homologue of the present enzyme may also be a genus or specieshomologue, i.e. an enzyme with a similar activity derived from anotherspecies.

A homologue of the enzyme may be isolated by using the proceduresdescribed herein.

Molecular Screening and Cloning by Polymerase Chain Reaction (PCR)

Molecular screening for DNA sequences of the invention may be carriedout by polymerase chain reaction (PCR) using genomic DNA ordouble-stranded cDNA isolated from a suitable source, such as any of theherein mentioned organisms, and synthetic oligonucleotide primersprepared on the basis of the DNA sequences or the amino acid sequencesdisclosed herein. For instance, suitable oligonucleotide primers may bethe primers described in the Materials and Methods section.

In accordance with well-known procedures, the PCR fragment generated inthe molecular screening may be isolated and subcloned into a suitablevector. The PCR fragment may be used for screening DNA libraries by e.g.colony or plaque hybridization.

Expression Cloning in Yeast

-   -   The DNA sequence of the invention encoding an enzyme exhibiting        endoglucanase activity may be isolated by a general method        involving    -   cloning, in suitable vectors, a DNA library from a suitable        source, such as any of the herein mentioned organisms    -   transforming suitable yeast host cells with said vectors,    -   culturing the host cells under suitable conditions to express        any enzyme of interest encoded by a clone in the DNA library,    -   screening for positive clones by determining any endoglucanase        activity of the enzyme produced by such clones, and    -   isolating the enzyme encoding DNA from such clones.

The general method is further disclosed in WO 94/14953 the contents ofwhich are hereby incorporated by reference. A more detailed descriptionof the screening method is given in Example 1 below.

The DNA sequence coding for the enzyme may for instance be isolated byscreening a cDNA library of Macrophomina phaseolina, Crinipellisscabella, Sordaria fimicola or Volutella colletotrichoides, andselecting for clones expressing the appropriate enzyme activity (i.e.endoglucanase activity) or from Escherichia coli DSM 10512 depositedunder the Budapest Treaty on 2 Feb. 1996, at DSM (Deutsche Sammlung vonMikroorganismen und Zellkulturen GmbH, Mascheroder Weg 16, D-38124Braunschweig, Germany), or from Escherichia coli DSM 10511 depositedunder the Budapest Treaty on 2 Feb. 1996, at DSM, or from Escherichiacoli DSM 10576, deposited under the Budapest Treaty on 12 Mar. 1996, atDSM; or from Escherichia coli DSM 10571 deposited under the BudapestTreaty on 6 Mar. 1996, at DSM; or by screening a cDNA library ofMyceliphthora thermophila, CBS 117.65, Acremonium sp., CBS 478.94, orThielavia terrestris, NRRL 8126, and selecting for clones expressing theappropriate enzyme activity (i.e. endoglucanase activity) or fromSaccharomyces cerevisiae DSM 9770 deposited under the Budapest Treaty on24 Feb. 1995, at DSM (Deutsche Sammlung von Mikroorganismen undZelikulturen GmbH, Mascheroder Weg 16, D-38124 Braunschweig, Germany),or from Saccharomyces cerevisiae DSM 10082 deposited under the BudapestTreaty on 30 Jun. 1995, at DSM, from Saccharomyces cerevisiae DSM 10080deposited under the Budapest Treaty on 30 Jun. 1995, or fromSaccharomyces cerevisiae DSM 10081 deposited under the Budapest Treatyon 30 Jun. 1995, at DSM. The appropriate DNA sequence may then beisolated from the clone by standard procedures, e.g. as described inExample 1.

Nucleic Acid Construct

As used herein the term “nucleic acid construct” is intended to indicateany nucleic acid molecule of cDNA, genomic DNA, synthetic DNA or RNAorigin. The term “construct” is intended to indicate a nucleic acidsegment which may be single- or double-stranded, and which may be basedon a complete or partial naturally occurring nucleotide sequenceencoding an enzyme of interest. The construct may optionally containother nucleic acid segments.

The nucleic acid construct encoding the enzyme of the invention maysuitably be of genomic or cDNA origin, for instance obtained bypreparing a genomic or cDNA library and screening for DNA sequencescoding for all or part of the enzyme by hybridization using syntheticoligonucleotide probes in accordance with standard techniques (cf.Sambrook et al., 1989).

The nucleic acid construct encoding the enzyme may also be preparedsynthetically by established standard methods, e.g. the phosphoamiditemethod described by Beaucage and Caruthers, (1981), or the methoddescribed by Matthes et al., (1984). According to the phosphoamiditemethod, oligonucleotides are synthesized, e.g. in an automatic DNAsynthesizer, purified, annealed, ligated and cloned in suitable vectors.

Furthermore, the nucleic acid construct may be of mixed synthetic andgenomic, mixed synthetic and cDNA or mixed genomic and cDNA originprepared by ligating fragments of synthetic, genomic or cDNA origin (asappropriate), the fragments corresponding to various parts of the entirenucleic acid construct, in accordance with standard techniques.

The nucleic acid construct may also be prepared by polymerase chainreaction using specific primers, for instance as described in U.S. Pat.No. 4,683,202 or Saiki et al., (1988).

The nucleic acid construct is preferably a DNA construct which term willbe used exclusively in this specification and claims.

Recombinant Vector

A recombinant vector comprising a DNA construct encoding the enzyme ofthe invention may be any vector which may conveniently be subjected torecombinant DNA procedures, and the choice of vector will often dependon the host cell into which it is to be introduced. Thus, the vector maybe an autonomously replicating vector, i.e. a vector which exists as anextrachromosomal entity, the replication of which is independent ofchromosomal replication, e.g. a plasmid. Alternatively, the vector maybe one which, when introduced into a host cell, is integrated into thehost cell genome and replicated together with the chromosome(s) intowhich it has been integrated.

The vector is preferably an expression vector in which the DNA sequenceencoding the enzyme of the invention is operably linked to additionalsegments required for transcription of the DNA. In general, theexpression vector is derived from plasmid or viral DNA, or may containelements of both. The term, “operably linked” indicates that thesegments are arranged so that they function in concert for theirintended purposes, e.g. transcription initiates in a promoter andproceeds through the DNA sequence coding for the enzyme.

The promoter may be any DNA sequence which shows transcriptionalactivity in the host cell of choice and may be derived from genesencoding proteins either homologous or heterologous to the host cell.

Examples of suitable promoters for use in yeast host cells includepromoters from yeast glycolytic genes (Hitzeman et al., J. Biol. Chem.255 (1980), 12073-12080; Alber and Kawasaki, J. Mol. Appl. Gen. 1(1982), 419-434) or alcohol dehydrogenase genes (Young et al., inGenetic Engineering of Microorganisms for Chemicals (Hollaender et al,eds.), Plenum Press, New York, 1982), or the TPI1 (U.S. Pat. No.4,599,311) or ADH2-4c (Russell et al., Nature 304 (1983), 652-654)promoters.

Examples of suitable promoters for use in filamentous fungus host cellsare, for instance, the ADH3 promoter (McKnight et al., The EMBO J. 4(1985), 2093-2099) or the tpiA promoter. Examples of other usefulpromoters are those derived from the gene encoding A. oryzae TAKAamylase, Rhizomucor miehei aspartic proteinase, A. niger neutralα-amylase, A. niger acid stable α-amylase, A. niger or A. awamoriglucoamylase (gluA), Rhizomucor miehei lipase, A. oryzae alkalineprotease, A. oryzae triose phosphate isomerase or A. nidulansacetamidase. Preferred are the TAKA-amylase and gluA promoters.

Examples of suitable promoters for use in bacterial host cells includethe promoter of the Bacillus stearothermophilus maltogenic amylase gene,the Bacillus licheniformis alpha-amylase gene, the Bacillusamyloliquefaciens BAN amylase gene, the Bacillus subtilis alkalineprotease gen, or the Bacillus pumilus xylosidase gene, or by the phageLambda P_(R) or P_(L) promoters or the E. coli lac, trp or tacpromoters.

The DNA sequence encoding the enzyme of the invention may also, ifnecessary, be operably connected to a suitable terminator.

The recombinant vector of the invention may further comprise a DNAsequence enabling the vector to replicate in the host cell in question.

The vector may also comprise a selectable marker, e.g. a gene theproduct of which complements a defect in the host cell, such as the genecoding for dihydrofolate reductase (DHFR) or the Schizosaccharomycespombe TPI gene (described by P. R. Russell, Gene 40, 1985, pp. 125-130).For filamentous fungi, selectable markers include amdS, pyrG, argB,niaD, sC.

To direct an enzyme of the present invention into the secretory pathwayof the host cells, a secretory signal sequence (also known as a leadersequence, prepro sequence or pre sequence) may be provided in therecombinant vector. The secretory signal sequence is joined to the DNAsequence encoding the enzyme in the correct reading frame. Secretorysignal sequences are commonly positioned 5′ to the DNA sequence encodingthe enzyme. The secretory signal sequence may be that normallyassociated with the enzyme or may be from a gene encoding anothersecreted protein.

For secretion from yeast cells, the secretory signal sequence may encodeany signal peptide which ensures efficient direction of the expressedenzyme into the secretory pathway of the cell. The signal peptide may benaturally occurring signal peptide, or a functional part thereof, or itmay be a synthetic peptide. Suitable signal peptides have been found tobe the α-factor signal peptide (cf. U.S. Pat. No. 4,870,008), the signalpeptide of mouse salivary amylase (cf. O. Hagenbuchle et al., Nature289, 1981, pp. 643-646), a modified carboxypeptidase signal peptide (cf.L. A. Valls et al., Cell 48, 1987, pp. 887-897), the yeast BAR1 signalpeptide (cf. WO 87/02670), or the yeast aspartic protease 3 (YAP3)signal peptide (cf. M. Egel-Mitani et al., Yeast 6, 1990, pp. 127-137).

For efficient secretion in yeast, a sequence encoding a leader peptidemay also be inserted downstream of the signal sequence and upstream ofthe DNA sequence encoding the enzyme. The function of the leader peptideis to allow the expressed enzyme to be directed from the endoplasmicreticulum to the Golgi apparatus and further to a secretory vesicle forsecretion into the culture medium (i.e. exportation of the enzyme acrossthe cell wall or at least through the cellular membrane into theperiplasmic space of the yeast cell). The leader peptide may be theyeast α-factor leader (the use of which is described in e.g. U.S. Pat.No. 4,546,082, EP 16 201, EP 123 294, EP 123 544 and EP 163 529).Alternatively, the leader peptide may be a synthetic leader peptide,which is to say a leader peptide not found in nature. Synthetic leaderpeptides may, for instance, be constructed as described in WO 89/02463or WO 92/11378.

For use in filamentous fungi, the signal peptide may conveniently bederived from a gene encoding an Aspergillus sp. amylase or glucoamylase,a gene encoding a Rhizomucor miehei lipase or protease, a Humicolalanuginosa lipase. The signal peptide is preferably derived from a geneencoding A. oryzae TAKA amylase, A. niger neutral α-amylase, A. nigeracid-stable amylase, or A. niger glucoamylase.

The procedures used to ligate the DNA sequences coding for the presentenzyme, the promoter and optionally the terminator and/or secretorysignal sequence, respectively, and to insert them into suitable vectorscontaining the information necessary for replication, are well known topersons skilled in the art (cf., for instance, Sambrook et al.,op.cit.).

Host Cells

The DNA sequence encoding the present enzyme introduced into the hostcell may be either homologous or heterologous to the host in question.If homologous to the host cell, i.e. produced by the host cell innature, it will typically be operably connected to another promotersequence or, if applicable, another secretory signal sequence and/orterminator sequence than in its natural environment. The term“homologous” is intended to include a cDNA sequence encoding an enzymenative to the host organism in question. The term “heterologous” isintended to include a DNA sequence not expressed by the host cell innature. Thus, the DNA sequence may be from another organism, or it maybe a synthetic sequence.

The host cell into which the DNA construct or the recombinant vector ofthe invention is introduced may be any cell which is capable ofproducing the present enzyme and includes bacteria, yeast, fungi andhigher eukaryotic cells.

Examples of bacterial host cells which, on cultivation, are capable ofproducing the enzyme of the invention are gram-positive bacteria such asstrains of Bacillus, such as strains of B. subtilis, B. licheniformis,B. lentus, B. brevis, B. stearothermophilus, B. alkalophilus, B.amyloliquefaciens, B. coagulans, B. circulans, B. lautus, B. megatheriumor B. thuringiensis, or strains of Streptomyces, such as S. lividans orS. murinus, or gram-negative bacteria such as Echerichia coli. Thetransformation of the bacteria may be effected by protoplasttransformation or by using competent cells in a manner known per se (cf.Sambrook et al., supra).

When expressing the enzyme in bacteria such as E. coli, the enzyme maybe retained in the cytoplasm, typically as insoluble granules (known asinclusion bodies), or may be directed to the periplasmic space by abacterial secretion sequence. In the former case, the cells are lysedand the granules are recovered and denatured after which the enzyme isrefolded by diluting the denaturing agent. In the latter case, theenzyme may be recovered from the periplasmic space by disrupting thecells, e.g. by sonication or osmotic shock, to release the contents ofthe periplasmic space and recovering the enzyme.

Examples of suitable yeasts cells include cells of Saccharomyces spp. orSchizosaccharomyces spp., in particular strains of Saccharomycescerevisiae or Saccharomyces kluyveri. Methods for transforming yeastcells with heterologous DNA and producing heterologous enzymes therefromare described, e.g. in U.S. Pat. No. 4,599,311, U.S. Pat. No. 4,931,373,U.S. Pat. Nos. 4,870,008, 5,037,743, and U.S. Pat. No. 4,845,075, all ofwhich are hereby incorporated by reference. Transformed cells areselected by a phenotype determined by a selectable marker, commonly drugresistance or the ability to grow in the absence of a particularnutrient, e.g. leucine. A preferred vector for use in yeast is the POT1vector disclosed in U.S. Pat. No. 4,931,373. The DNA sequence encodingthe enzyme of the invention may be preceded by a signal sequence andoptionally a leader sequence, e.g. as described above. Further examplesof suitable yeast cells are strains of Kluyveromyces, such as K. lactis,Hansenula, e.g. H. polymorpha, or Pichia, e.g. P. pastoris (cf. Gleesonet al., J. Gen. Microbiol. 132, 1986, pp. 3459-3465; U.S. Pat. No.4,882,279).

Examples of other fungal cells are cells of filamentous fungi, e.g.Aspergillus spp., Neurospora spp., Fusarium spp. or Trichoderma spp., inparticular strains of A. oryzae, A. nidulans, A. niger, or Fusariumgraminearum. The use of Aspergillus spp. for the expression of proteinsis described in, e.g., EP 272 277, EP 230 023. The transformation of F.oxysporum may, for instance, be carried out as described by Malardier etal., 1989, Gene 78: 147-156.

When a filamentous fungus is used as the host cell, it may betransformed with the DNA construct of the invention, conveniently byintegrating the DNA construct in the host chromosome to obtain arecombinant host cell. This integration is generally considered to be anadvantage as the DNA sequence is more likely to be stably maintained inthe cell. Integration of the DNA constructs into the host chromosome maybe performed according to conventional methods, e.g. by homologous orheterologous recombination.

The transformed or transfected host cell described above is thencultured in a suitable nutrient medium under conditions permitting theexpression of the present enzyme, after which the resulting enzyme isrecovered from the culture.

The medium used to culture the cells may be any conventional mediumsuitable for growing the host cells, such as minimal or complex mediacontaining appropriate supplements. Suitable media are available fromcommercial suppliers or may be prepared according to published recipes(e.g. in catalogues of the American Type Culture Collection). The enzymeproduced by the cells may then be recovered from the culture medium byconventional procedures including separating the host cells from themedium by centrifugation or filtration, precipitating the proteinaceouscomponents of the supernatant or filtrate by means of a salt, e.g.ammonium sulphate, purification by a variety of chromatographicprocedures, e.g. ion exchange chromatography, gel filtrationchromatography, affinity chromatography, or the like, dependent on thetype of enzyme in question.

In a still further aspect, the present invention relates to a method ofproducing an enzyme according to the invention, wherein a suitable hostcell transformed with a DNA sequence encoding the enzyme is culturedunder conditions permitting the production of the enzyme, and theresulting enzyme is recovered from the culture.

Enzyme Screening Driven by Taxonomy as Well as Ecology

A powerful tool like the molecular screening disclosed herein, designedto detect and select said type of interesting enzymes, can still notstand on its own. In order to maximize the chances of making interestingdiscoveries the molecular screening approach was in the presentinvestigation combined with careful selection of which fungi to screen.The selection was done through a thorough insight in the identificationof fungi, in taxonomical classification and in phylogeneticrelationships.

A taxonomic hot spot for production of cellulytic enzymes can furtheronly be fully explored if also the ecological approach is included.Thorough knowledge about the adaptation to various substrates(especially saprotrophic, necrotrophic or biotrophic degradation ofplant materials) are prerequisites for designing an intelligentscreening and for managing a successful selection of strains andecological niches to be searched.

Both the taxonomy and the ecological approach disclosed herein aim atmaximizing discovery of said enzymes in the molecular screening program.However, still several hundreds (or if all preliminary work is included)several thousand fungi have been brought in culture in order to detectthe 53 hits of said type of cellulytic enzyme here reported.

The screening and cloning may be carried out using the following:

Materials and Methods

List of Organisms:

Saccharomyces cerevisiae , DSM 9770, DSM 10082, DSM 10080, DSM 10081, orEscherichia coli, DSM 10512, DSM 10511, DSM 10571, DSM 10576,respectively, containing the plasmid comprising the full length DNAsequence, coding for the endoglucanase of the invention, in the shuttlevector pYES 2.0.

Escherichia coli DSM 10583, 10584, 10585, 10586, 10587, and 10588.

Diplodia gossypina Cooke

-   Deposit of Strain, Acc No: CBS 274.96-   Classification: Ascomycota, Loculoascomycetes, Dothideales,    Cucurbitariaceae

Ulospora bilgramii (Hawksw. et al.) Hawksw. et al.

-   Acc No of strain: NKBC 1444, Nippon University, (Prof. Tubaki    collection)-   Classification: Ascomycota, Loculoascomycetes, Dothideales, (family    unclassified)

Microsphaeropsis sp.

-   Isolated from: Leaf of Camellia japonica (Theaceae, Guttiferales),    grown in Kunming Botanical garden, Yunnan Province, China-   Classification: Ascomycota, Loculoascomycetes, Dothideales, (family    unclassified)

Macrophomina phaseolina (Tassi) Goidannich

-   Syn: Rhizoctonia bataticola-   Deposit of Strain, Acc No.:CBS 281.96-   Isolated from seed of Glycine max (Leguminosa), cv CMM 60, grown in    Thailand, 1990-   Classification: Ascomycota, Discomycetes, Rhytismatales,    Rhytismataceae

Ascobolus stictoideus Speg.

-   Isolated from goose dung, Svalbard, Norway-   Classification: Ascomycota, Discomycetes, Pezizales, Ascobolaceae

Saccobolus dilutellus (Fuck.) Sacc.

-   Deposit of strain: Acc No CBS 275.96-   Classification: Ascomycota, Discomycetes, Pezizales, Ascobolaceae

Penicillium verruculosum Peyronel

-   Ex on Acc No of species: ATCC 62396-   Classification: Ascomycota, Plectomycetes, Eurotiales,    Trichocomaceae

Penicillium chrysogenum Thom

-   Acc No of Strain: ATCC 9480-   Classification: Ascomycota, Plectomycetes, Eurotiales,    Trichocomaceae

Thermomyces verrucosus Pugh et al

-   Deposit of Strain, Acc No.: CBS 285.96-   Classification: Ascomycota, Plectomycetes, Eurotiales, (family    unclassified; affiliation based on 18S RNA, sequencing and    homologies)

Xylaria hypoxylon L. ex Greville

-   Deposit of Strain, Acc No: CBS 284.96-   Classification: Ascomycota, Pyrenomycetes, Xylariales, Xylariaceae

Poronia punctata (Fr ex L.) Fr.

-   Classification: Ascomycota, Pyrenomycetes, Xylariales, Xylariaceae

Nodulisporum sp

-   Isolated from leaf of Camellia reticulatá (Theaceae, Guttiferales),    grown in Kunming Botanical Garden, Yunnan Province, China-   Classification: Ascomycota, Pyrenomycetes, Xylariales, Xylariaceae

Cylindrocarpon sp

-   Isolated from marine sample, the Bahamas-   Classification: Ascomycota, Pyrenomycetes, Hypocreales    (unclassified)

Acremonium sp

-   Deposit of Strain, Acc. No.: CBS 478.94-   Classification: Ascomycota, Pyrenomycetes, Hypocreales, Hypocreaceae

Fusarium anguioides Sherbakoff

-   Acc No of strain: IFO 4467-   Classification: Ascomycota, Pyrenomycetes, Hypocreales, Hypocreaceae

Fusarium poae (Peck) Wr.

-   Ex on Acc No of species: ATCC 60883-   Classification: Ascomycota, Pyrenomycetes, Hypocreales, Hypocreaceae

Fusarium solani (Mart.)Sacc.emnd.Snyd & Hans.

-   Acc No of strain: IMI 107.511-   Classification: Ascomycota, Pyrenomycetes, Hypocreales, Hypocreaceae

Fusarium oxysporum ssp lycopersici (Sacc.)Snyd. & Hans.

-   Acc No of strain: CBS 645.78-   Classification: Ascomycota, Pyrenomycetes, Hypocreales, Hypocreaceae

Fusarium oxysporum ssp passiflora

-   Acc No of strain: CBS 744.79-   Classification: Ascomycota, Pyrenomycetes, Hypocreales, Hypocreaceae

Gliocladium catenulatum Gillman & Abbott

-   Acc. No. of strain: CBS 227.48-   Classification: Ascomycota, Pyrenomycetes, Hypocreales, Hypocreaceae

Nectria pinea Dingley

-   Deposit of Strain, Acc. No. CBS 279.96-   Classification: Ascomycota, Pyrenomycetes, Hypocreales, Nectriaceae

Volutella colletotrichoides

-   Acc No of Strain: CBS 400.58-   Classification: Ascomycota, Pyrenomycetes, Hypocreales    (unclassified)

Sordaria macrospora Auerswald

-   Ex on Acc No of species: ATCC 60255-   Classification: Ascomycota, Pyrenomycetes, Sordariales, Sordariaceae

Sordaria fimicola (Roberge) Cesati et De Notaris

-   Ex on Acc. No. for the species: ATCC 52644-   Isolated from dung by H.Dissing, ISP, KU, Denmark-   Classification: Ascomycota, Pyrenomycetes, Sordariales, Sordariaceae

Humicola grisea Traeen

-   ex on Acc No for the species: ATCC 22726-   Source: Hatfield Polytechnic-   Classification: Ascomycota, Pyrenomycetes, Sordariales, (fam.    unclassified)

Humicola nigrescens Omvik

-   Acc No of strain: CBS 819.73-   Classification: Ascomycota, Pyrenomycetes, Sordariales, (fam.    unclassified)

Scytalidium thermophilum (Cooney et Emerson) Austwick

-   Acc No of strain: ATCC 28085-   Classification: Ascomycota, Pyrenomycetes, Sordariales, (fam.    unclassified)

Thielavia thermophila Fergus et Sinden

-   (syn Corynascus thermophilus)-   Acc No of strain: CBS 174.70, IMI 145.136-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Chaetomiaceae-   Isolated from Mushroom compost

Thielavia terrestris (Appinis) Malloch et Cain

-   Acc No of strain: NRRL8126-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Chaetomiaceae

Cladorrhinum foecundissimum Saccardo et Marchal

-   Ex on Acc No of species: ATCC 62373-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Lasiosphaeriaceae-   Isolated from leaf of Selandin sp. (Compositaceae, Asterales),    Dallas Mountain, Jamaica

Syspastospora boninensis

-   Acc No of strain: NKBC 1515 (Nippon University, profe Tubaki    Collection)-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Cerastomataceae

Chaetomium cuniculorum Fuckel

-   Acc. No. of strain: CBS 799.83-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Chaetomiaceae

Chaetomium brasiliense Batista et Potual

-   Acc No of strain: CBS 122.65-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Chaetomiaceae

Chaetomium murorum Corda

-   Acc No of strain: CBS 163.52-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Chaetomiaceae

Chaetomium virescens (von Arx) Udagawa

-   Acc.No. of strain: CBS 547.75-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Chaetomiaceae

Myceliophthora thermophila (Apinis) Oorschot

-   Deposit of Strain, Acc No:CBS 117.65-   Classification: Ascomycota, Pyrenomycetes, Sordariales,    Chaetomiaceae

Nigrospora sp

-   Deposit of strain, Acc No: CBS 272.96-   Isolated from leaf of Artocarpus altilis, Moraceae, Urticales grown    in Christiana, Jamaica-   Classification: Ascomycota, Pyrenomycetes, Trichosphaeriales,    (family unclassified)

Nigrospora sp

-   Isolated from leaf of Pinus yuannanensis, Botanical Garden, Kuning,    Yunnan.-   Classification: Ascomycota, Pyrenomycetes, Trichosphaeriales,    Abietaceae, Pinales.

Diaporthe syngenesia

-   Deposit of strain, Acc No: CBS 278.96-   Classification: Ascomycota, Pyrenomycetes, Diaporthales, Valsaceae

Colletotrichum lagenarium (Passerini) Ellis et Halsted

-   syn Glomerella cingulata var orbiculare Jenkins et Winstead-   Ex on acc No of species: ATCC 52609-   Classification: Ascomycota, Pyrenomycetes, Phyllachorales

Exidia glandulosa Fr.

-   Deposit of Strain, Acc No: CBS 277.96-   Classification: Basidiomycota, Hymenomycetes, Auriculariales,    Exidiaceae

Crinipellis scabella (Alb.&Schw.:Fr.)Murr

-   Deposit of strain: Acc No CBS 280.96-   Classification: Basidiomycota, Hymenomycetes, Agaricales,

Panaeolus retirugis (Fr.) Gill.

-   Acc.No. of strain: CBS 275.47-   Classification: Basidiomycota, Hymenomycetes, Agaricales,    Coprinaceae

Fomes fomentarius (L.) Fr.

-   Deposit of strain: Acc No. CBS 276.96-   Classification: Basidiomycota, Hymenomycetes, Aphyllophorales,    Fomitaceae

Spongipellis sp.

-   Deposit of Strain: Acc No CBS 283.96-   Classification: Basidiomycota, Hymenomycetes, Aphyllophorales,-   Bjerkanderaceae (identified and affiliated taxonomically by 18S    sequence and homology)

Trametes sanguinea (Fr.) Lloyd

-   syn: Polyporus sanguineus; Pycnoporus sanguineus (L.:Fr.) Murrill-   Acc No of strain: AKU 5062 (Kyoto University Culture Collection)-   Classification: Basidiomycota, Aphyllophorales, Polyporaceae

Schizophyllum commune Fr

-   Acc. No. of species: ATCC 38548-   Classification: Basidiomycota, Aphyllophorales, Schizophyllaceae

Rhizophlyctis rosea (de Bary & Wor) Fischer

-   Deposit of Strain: Acc No.: CBS 282.96-   Classification: Chytridiomycota, Chytridiomycetes,    Spizellomycetales, Spizellomycetaceae

Rhizomucor pusillus (Lindt) Schipper

-   syn: Mucor pusillus-   Acc No of strain: IFO 4578-   Ex on Acc No of species: ATCC 46883-   Classification: Zygomycota, Zygomycetes, Mucorales, Mucoraceae

Phycomyces nitens (Kunze) van Tieghem & Le Monnier

-   Acc No of strain: IFO 4814-   Ex on Acc No of species: ATCC 16327-   Classification: Zygomycota, Zygomycetes, Mucorales, Mucoraceae

Chaetostylum fresenii van Tieghem & Le Monnier

-   syn. Helicostylum fresenii-   Acc No of strain NRRL 2305-   Classification: Zygomycota, Zygomycetes, Mucorales, Thamnidiaceae    Unclassified;

Trichothecium roseum

-   Acc No of strain: IFO 5372

Coniothecium sp

-   Endophyte, isolated from leaf of unidentifed higher plant, growing    in Kunming, Yunnan, China    Unclassified and Un-identified;

Deposit of strain, Acc No.: CBS 271.96

-   Isolated from leaf of Artocarpus altilis (Moraceae, Urticales),    grown in Christiana, Jamaica

Deposit of strain, Acc No.: CBS 273.96

-   Isolated from leaf of Pimenta dioica (Myrtaceae, Myrtales) grown in    Dallas Mountain, Jamaica

Deposit of strain: CBS 270.96

-   Isolated from leaf of Pseudocalymma alliaceum (Bignoniaceae,    Solanales) growing in Dallas Mountain, Jamaica    Other Strains;

Escherichia coli MC1061 and DH10B.

Yeast strain: The Saccharomyces cerevisiae strain used was W3124 (MATα;ura 3-52; leu 2-3, 112; his 3-D200; pep 4-1137; prc1::HIS3; prb1:: LEU2;cir+).

Plasmids:

The Aspergillus expression vector pHD414 is a derivative of the plasmidp775 (described in EP 238 023). The construction of pHD414 is furtherdescribed in WO 93/11249.

-   pYES 2.0 (Invitrogen)-   pA2C477, pA2C193, pA2C357, pA2C371, pA2C385, pA2C475, pA2C488,    pA2C502 (See example 1, 2, 3 and 4).    Isolation of the DNA Sequence of SEQ ID NO: 1, 7, 9, 11, 13, 15, 21,    or 25, Respectively:

The full length DNA sequence, comprising the cDNA sequence of SEQ ID NO:1, 7, 9, 11, 13, 15, 21, or 25, respectively, coding for theendoglucanase of the invention, can be obtained from the depositedorganism S. cerevisiae, DSM 9770, DSM 10082, DSM 10080, DSM 10081, Ecoli, DSM 10512, DSM 10511, DSM 10571 or DSM 10576, respectively, byextraction of plasmid DNA by methods known in the art (Sambrook et al.(1989) Molecular cloning: A laboratory manual, Cold Spring Harbor lab.,Cold Spring Harbor, N.Y.).

PCR Primers for Molecular Screening of Cellulases of the PresentInvention:

The four degenerate, deoxyinosine-containing oligonucleotide primers(sense; s and antisense; as1, as2 and as3) corresponding to four highlyconserved amino acid regions found in the deduced amino acid sequencesof Thielavia terrestris cellulase, Myceliophthora thermophilumcellulase, and two cellulases from Acremonium sp. The residues arenumbered according to the Myceliophthora thermophilum sequence. Thedeoxyinosines are depicted by an I in the primer sequences, and therestriction sites are underlined.

27                               35          NH₂— Thr Arg Tyr Trp AspCys Cys Lys Pro/Thr —COOH (SEQ ID NO:79) s 5′-CCCCAAGCTT ACI AGI TAC TGGGAC TGC TGC AAA AC -3′ (SEQ ID NO:84) HindIII    C     T       T   T   T   G C 106                 111          NH₂—Trp Cys Cys Ala Cys Tyr —COOH (SEQ ID NO:81)       as1 3′-  CC ACA ACACGI ACA AT    AGATCTGATC -5′ (SEQ ID NO:85)      G   G       G        XbaI 145                                  152         NH₂— Pro Gly Gly Gly Leu/Val Gly Ile/Leu Phe —COOH (SEQ IDNO:82)       as2 3′- GGI CCI CCI CCI AAI     CCIAAI     AA    AGATCTGATC -5′ (SEQ ID NO:86)                 C           G              XbaI                 G           T 193 198          NH₂— Trp Arg Phe/Tyr AspTrp Phe —COOH (SEQ ID NO:83)       as3 3′-  CC GCI AAA     CTA ACCAAA  AGATCTGATC -5′ (SEQ ID NO:87)     T    TG       G       G    XbaIMolecular Screening by Polymerase Chain Reaction (PCR):In vitro Amplification of Genomic DNA and Double-stranded cDNA.

Directional, double-stranded cDNA was synthesized from 5 μg ofpoly(A)⁺RNA as described below. Genomic DNA was isolated according toYelton et al.

Approximately 10 to 20 ng of double-stranded, cellulase-induced cDNA or100 to 200 ng of genomic DNA from a selection of fungal strains was PCRamplified in PCR buffer (10 mM Tris-HCl, pH 8.3, 50 mM KCl, 1.5 mMMgCl₂, 0.01% (w/v) gelatin) containing 200 μM of each dNTP and 100 pmolof each degenerate primer in three combinations:

1) sense,5′-CCCCAAGCTTACI^(A)/_(C)GITA^(C)/_(T)TGGGA^(C)/_(T)TG^(C)/_(T)TG^(C)/_(T)AA^(A)/_(G)^(A)/_(C)C-3′ (SEQ ID NO:84) antisense 1,5′-CTAGTCTAGATA^(A)/_(G)CAIGC^(A)/_(G)CA^(A)/_(G)CACC-3′ (SEQ ID NO:85);or 2) sense,5′-CCCCAAGCTTACI^(A)/_(C)GITA^(C)/_(T)TGGGA^(C)/_(T)TG^(C)/_(T)TG^(C)/_(T)AA^(A)/_(G)^(A)/_(C)C-3′ (SEQ ID NO:84) antisense 2,CTAGTCTAGAAAIA^(A)/_(G)/^(T)ICCIA^(A)/^(C)/^(G)ICCICCICCIGG -3′ (SEQ IDNO:86); or 3) sense,5′-CCCCAAGCTTACI^(A)/_(C)GITA^(C)/_(T)TGGGA^(C)/_(T)TG^(C)/_(T)TG^(C)/_(T)AA^(A)/_(G)^(A)/_(C)C-3′ (SEQ ID NO:84) antisense 3,5′-CTAGTCTAGAIAACCA^(A)/_(G)TCA^(A)/_(G) ^(A)/_(T)AIC^(G)/_(T)CC-3 (SEQID NO:87);a DNA thermal cycler (Landgraf, Germany) and 2.5 units of Taq polymerase(Perkin-Elmer, Cetus, USA). Thirty cycles of PCR were performed using acycle profile of denaturation at 94° C. for 1 min, annealing at 64° C.for 2 min, and extension at 72° C. for 3 min. Ten-μl aliquots of theamplification products were analyzed by electrophoresis in 3% agarosegels (NuSieve, FMC) with HaeIII-digested φX174 RF DNA as a size marker.Direct Sequencing of the PCR Products.

Eight-μl aliquots of the PCR products were purified using the QIAquickPCR purification kit (Qiagen, USA) according to the manufacturer'sinstructions. The nucleotide sequences of the amplified PCR fragmentswere determined directly on the purified PCR products by the dideoxychain-termination method, using 50-150 ng template, the Taqdeoxy-terminal cycle sequencing kit (Perkin-Elmer, USA), fluorescentlabeled terminators and 5 pmol of the sense primer:5′-CCCCAAGCTTACI^(A)/_(C)GITA^(C)/_(T)TGGGA^(C)/_(T)T-G^(C)/_(T)TG^(C)/_(T)AA^(A)/_(G)^(A)/_(C)C-3′ (SEQ ID NO: 84). Analysis of the sequence data wasperformed according to Devereux et al.

Cloning by Polymerase Chain Reaction (PCR):

Subcloning of PCR Fragments.

Twenty five μl aliquots of the PCR products generated as described abovewere electrophoresed in 0.8% low gelling temperature agarose (SeaPlaqueGTG, FMC) gels, the relevant fragments were excised from the gels, andrecovered by agarase treatment by adding 0.1 vol of 10×agarase buffer(New England Biolabs) and 2 units per 100 μl molten agarose to thesample, followed by incubation at 45° C. for 1.5 h. The sample wasphenol and chloroform extracted, and precipitated by addition of 2 volsof 96% EtOH and 0.1 of 3 M NaAc, pH 5.2. The PCR fragments wererecovered by centrifugation, washed in 70% EtOH, dried and resuspendedin 20 μl of restriction enzyme buffer (10 mM Tris-HCl, 10 mM MgCl2, 50mM NaCl, 1 mM DTT). The fragments were digested with HindIII and XbaI,phenol and chloroform extracted, recovered by precipitation with 2 volsof 96% EtOH and 0.1 of 3 M NaAc, pH 5.2, and subcloned intoHindIII/XbaI-cleaved pYES 2.0 vector.

Screening of cDNA Libraries and Characterization of the Positive Clones

cDNA libraries in S. cerevisiae or E. coli, constructed as describedbelow, were screened by colony hybridization (Sambrook, 1989) using thecorresponding random-primed (Feinberg and Vogelstein) ³²P-labeled(>1×10⁹ cpm/μg) PCR products as probes. The hybridizations were carriedout in 2×SSC (Sambrook, 1989), 5×Denhardt's solution (Sambrook, 1989),0.5% (w/v) SDS, 100 μg/ml denatured salmon sperm DNA for 20 h at 65° C.followed by washes in 5×SSC at 25° C. (2×15 min), 2×SSC, 0.5% SDS at 65°C. (30 min), 0.2×SSC, 0.5% SDS at 65° C. (30 min) and finally in 5×SSC(2×15 min) at 25° C. The positive cDNA clones were characterized bysequencing the ends of the cDNA inserts with pYES 2.0 polylinker primers(Invitrogen, USA), and by determining the nucleotide seuence of thelongest cDNA from both strands by the dideoxy chain termination method(Sanger et al.) using fluorescent labeled terminators. Qiagen purifiedplasmid DNA (Qiagen, USA) was sequenced with the Taq deoxy terminalcycle sequencing kit (Perkin Elmer, USA) and either pYES 2.0 polylinkerprimers (Invitrogen, USA) or synthetic oligonucleotide primers using anApplied Biosystems 373A automated sequencer according to themanufacturers instructions. Analysis of the sequence data was performedaccording to Devereux et al.

Extraction of total RNA was performed with guanidinium thiocyanatefollowed by ultracentrifugation through a 5.7 M CsCl cushion, andisolation of poly(A)⁺RNA was carried out by oligo(dT)-cellulose affinitychromatography using the procedures described in WO 94/14953.

cDNA Synthesis

Double-stranded cDNA was synthesized from 5 μg poly(A)⁺RNA by the RNaseH method (Gubler and Hoffman (1983) Gene 25:263-269, Sambrook et al.(1989) Molecular cloning: A laboratory manual, Cold Spring Harbor lab.,Cold Spring Harbor, N.Y.) using the hair-pin modification developed byF. S. Hagen (pers. comm.). The poly(A)⁺ RNA (5 μg in 5 μl ofDEPC-treated water) was heated at 70□ C. for 8 min. in apre-siliconized, RNase-free Eppendorph tube, quenched on ice andcombined in a final volume of 50 μl with reverse transcriptase buffer(50 mM Tris-Cl, pH 8.3, 75 mM KCl, 3 mM MgCl₂, 10 mM DTT, BethesdaResearch Laboratories) containing 1 mM of dATP, dGTP and dTTP and 0.5 mM5-methyl-dCTP (Pharmacia), 40 units human placental ribonucleaseinhibitor (RNasin, Promega), 1.45 μg of oligo(dT)₁₈-Not I primer(Pharmacia) and 1000 units SuperScript II RNase H reverse transcriptase(Bethesda Research Laboratories). First-strand cDNA was synthesized byincubating the reaction mixture at 45□ C. for 1 hour. After synthesis,the mRNA:cDNA hybrid mixture was gelfiltrated through a MicroSpin S-400HR (Pharmacia) spin column according to the manufacturer's instructions.

After the gelfiltration, the hybrids were diluted in 250 μl secondstrand buffer (20 mM Tris-Cl, pH 7.4, 90 mM KCl, 4.6 mM MgCl₂, 10 mM(NH₄)₂SO₄, 0.16 mM βNAD+) containing 200 μM of each dNTP, 60 units E.coli DNA polymerase I (Pharmacia), 5.25 units RNase H (Promega) and 15units E. coli DNA ligase (Boehringer Mannheim). Second strand cDNAsynthesis was performed by incubating the reaction tube at 16° C. for 2hours and additional 15 min. at 25° C. The reaction was stopped byaddition of EDTA to a final concentration of 20 mM followed by phenoland chloroform extractions.

Mung Bean Nuclease Treatment

The double-stranded cDNA was precipitated at −20° C. for 12 hours byaddition of 2 vols 96% EtOH, 0.2 vol 10 M NH₄Ac, recovered bycentrifugation, washed in 70% EtOH, dried and resuspended in 30 μl Mungbean nuclease buffer (30 mM NaAc, pH 4.6, 300 mM NaCl, 1 mM ZnSO₄, 0.35mM DTT, 2% glycerol) containing 25 units Mung bean nuclease (Pharmacia).The single-stranded hair-pin DNA was clipped by incubating the reactionat 30° C. for 30 min., followed by addition of 70 μl 10 mM Tris-Cl, pH7.5, 1 mM EDTA, phenol extraction and precipitation with 2 vols of 96%EtOH and 0.1 vol 3 M NaAc, pH 5.2 on ice for 30 min.

Blunt-ending with T4 DNA Polymerase

The double-stranded cDNAs were recovered by centrifugation andblunt-ended in 30 μl T4 DNA polymerase buffer (20 mM Tris-acetate, pH7.9, 10 mM MgAc, 50 mM KAc, 1 mM DTT) containing 0.5 mM of each dNTP and5 units T4 DNA polymerase (New England Biolabs) by incubating thereaction mixture at 16° C. for 1 hour. The reaction was stopped byaddition of EDTA to a final concentration of 20 mM, followed by phenoland chloroform extractions, and precipitation for 12 hours at −20° C. byadding 2 vols 96% EtOH and 0.1 vol 3 M NaAc pH 5.2.

Adaptor Ligation, Not I Digestion and Size Selection:

After the fill-in reaction the cDNAs were recovered by centrifugation,washed in 70% EtOH and dried. The cDNA pellet was resuspended in 25 μlligation buffer (30 mM Tris-Cl, pH 7.8, 10 mM MgCl₂, 10 mM DTT, 0.5 mMATP) containing 2.5 μg non-palindromic BstXI adaptors (Invitrogen) and30 units T4 ligase (Promega) and incubated at 16° C. for 12 hours. Thereaction was stopped by heating at 65° C. for 20 min. and then coolingon ice for 5 min. The adapted cDNA was digested with Not I restrictionenzyme by addition of 20 μl water, 5 μl 10× Not I restriction enzymebuffer (New England Biolabs) and 50 units Not I (New England Biolabs),followed by incubation for 2.5 hours at 37° C. The reaction was stoppedby heating at 65° C. for 10 min. The cDNAs were size-fractionated by gelelectrophoresis on a 0.8% SeaPlaque GTG low melting temperature agarosegel (FMC) in 1× TBE to separate unligated adaptors and small cDNAs. ThecDNA was size-selected with a cut-off at 0.7 kb and rescued from the gelby use of β-Agarase (New England Biolabs) according to themanufacturer's instructions and precipitated for 12 hours at −20° C. byadding 2 vols 96% EtOH and 0.1 vol 3 M NaAc pH 5.2.

Construction of Libraries

The directional, size-selected cDNA was recovered by centrifugation,washed in 70% EtOH, dried and resuspended in 30 μl 10 mM Tris-Cl, pH7.5, 1 mM EDTA. The cDNAs were desalted by gelfiltration through aMicroSpin S-300 HR (Pharmacia) spin column according to themanufacturer's instructions. Three test ligations were carried out in 10μl ligation buffer (30 mM Tris-Cl, pH 7.8, 10 mM MgCl₂, 10 mM DTT, 0.5mM ATP) containing 5 μl double-stranded cDNA (reaction tubes #1 and #2),15 units T4 ligase (Promega) and 30 ng (tube #1), 40 ng (tube #2) and 40ng (tube #3, the vector background control) of BstXI-NotI cleaved pYES2.0 vector. The ligation reactions were performed by incubation at 16□C. for 12 hours, heating at 70° C. for 20 min. and addition of 10 μlwater to each tube. 1 μl of each ligation mixture was electroporatedinto 40 μl electrocompetent E. coli DH10B cells (Bethesda researchLaboratories) as described (Sambrook et al. (1989) Molecular cloning: Alaboratory manual, Cold Spring Harbor lab., Cold Spring Harbor, N.Y.).Using the optimal conditions a library was established in E. coliconsisting of pools. Each pool was made by spreading transformed E. colion LB+ampicillin agar plates giving 15.000-30.000 colonies/plate afterincubation at 37° C. for 24 hours. 20 ml LB+ampicillin was added to theplate and the cells were suspended herein. The cell suspension wasshaked in a 50 ml tube for 1 hour at 37° C. Plasmid DNA was isolatedfrom the cells according to the manufacturer's instructions using QIAGENplasmid kit and stored at −20° C.

1 μl aliquots of purified plasmid DNA (100 ng/μl) from individual poolswere transformed into S. cerevisiae W3124 by electroporation (Becker andGuarante (1991) Methods Enzymol. 194:182-187) and the transformants wereplated on SC agar containing 2% glucose and incubated at 30° C.

Identification of Positive Colonies

After 3-5 days of growth, the agar plates were replica plated onto a setof SC+galactose-uracil agar plates containing 0.1% AZCL HE cellulose.These plates were incubated for 3-7 days at 30□ C. Endoglucanasepositive colonies were identified as colonies surrounded by a blue halo.

Cells from enzyme-positive colonies were spread for single colonyisolation on agar, and an enzyme-producing single colony was selectedfor each of the endoglucanase-producing colonies identified.

Characterization of Positive Clones

The positive clones were obtained as single colonies, the cDNA insertswere amplified directly from the yeast colony using biotinylatedpolylinker primers, purified by magnetic beads (Dynabead M-280, Dynal)system and characterized individually by sequencing the 5′-end of eachcDNA clone using the chain-termination method (Sanger et al. (1977)Proc. Natl. Acad. Sci. U.S.A. 74:5463-5467) and the Sequenase system(United States Biochemical).

The nucleotide sequence was determined of the longest cDNA from bothstrands by the dideoxy chain termination method (Sanger et al.) usingfluorescent labeled terminators. Plasmid DNA was rescued bytransformation into E. coli as described below. Qiagen purified plasmidDNA (Qiagen, USA) was sequenced with the Taq deoxy terminal cyclesequencing kit (Perkin Elmer, USA) and either pYES 2.0 polylinkerprimers (Invitrogen, USA) or synthetic oligonucleotide primers using anApplied Biosystems 373A automated sequencer according to themanufacturers instructions. Analysis of the sequence data was performedaccording to Devereux et al.

Isolation of a cDNA Gene for Expression in Aspergillus

An endoglucanase-producing yeast colony was inoculated into 20 ml YPDbroth in a 50 ml glass test tube. The tube was shaken for 2 days at 30°C. The cells were harvested by centrifugation for 10 min. at 3000 rpm.

DNA was isolated according to WO 94/14953 and dissolved in 50 μl water.The DNA was transformed into E. coli by standard procedures. Plasmid DNAwas isolated from E. coli using standard procedures, and analyzed byrestriction enzyme analysis. The cDNA insert was excised usingappropriate restriction enzymes and ligated into an Aspergillusexpression vector.

Transformation of Aspergillus oryzae or Aspergillus niger

Protoplasts may be prepared as described in WO 95/02043, p. 16, line21-page 17, line 12, which is hereby incorporated by reference.

100 μl of protoplast suspension is mixed with 5-25 μg of the appropriateDNA in 10 μl of STC (1.2 M sorbitol, 10 mM Tris-HCl, pH=7.5, 10 mMCaCl₂). Protoplasts are mixed with p3SR2 (an A. nidulans amdS genecarrying plasmid). The mixture is left at room temperature for 25minutes. 0.2 ml of 60% PEG 4000 (BDH 29576), 10 mM CaCl₂ and 10 mMTris-HCl, pH 7.5 is added and carefully mixed (twice) and finally 0.85ml of the same solution is added and carefully mixed. The mixture isleft at room temperature for 25 minutes, spun at 2500 g for 15 minutesand the pellet is resuspended in 2 ml of 1.2 M sorbitol. After one moresedimentation the protoplasts are spread on minimal plates (Cove,Biochem. Biophys. Acta 113 (1966) 51-56) containing 1.0 M sucrose, pH7.0, 10 mM acetamide as nitrogen source and 20 mM CsCl to inhibitbackground growth. After incubation for 4-7 days at 37° C. spores arepicked and spread for single colonies. This procedure is repeated andspores of a single colony after the second reisolation is stored as adefined transformant.

Test of A. oryzae Transformants

Each of the transformants were inoculated in 10 ml YPM and propagated.After 2-5 days of incubation at 37° C., 10 ml supernatant was removed.The endoglucanase activity was identified by AZCL HE cellulose asdescribed above.

Hybridization conditions (to be used in evaluating property ii) of theDNA construct of the invention): Suitable conditions for determininghybridization between a nucleotide probe and a homologous DNA or RNAsequence involves presoaking of the filter containing the DNA fragmentsor RNA to hybridize in 5×SSC (standard saline citrate) for 10 min, andprehybridization of the filter in a solution of 5×SSC (Sambrook et al.1989), 5×Denhardt's solution (Sambrook et al. 1989), 0.5% SDS and 100μg/ml of denatured sonicated salmon sperm DNA (Sambrook et al. 1989),followed by hybridization in the same solution containing arandom-primed (Feinberg, A. P. and Vogelstein, B. (1983) Anal. Biochem.132:6-13), ³²P-dCTP-labeled (specific activity >1×10⁹ cpm/μg) probe for12 hours at ca. 45° C. The filter is then washed two times for 30minutes in 2×SSC, 0.5% SDS at preferably not higher than 50° C., morepreferably not higher than 55° C., more preferably not higher than 60°C., more preferably not higher than 65° C., even more preferably nothigher than 70° C., especially not higher than 75° C.

The nucleotide probe to be used in the hybridization is the DNA sequencecorresponding to the endoglucanase encoding part of the DNA sequence ofSEQ ID NO: 1, 7, 9, 11, 13, 15, 21, or 25, resepctively, and/or the DNAsequence obtainable from the plasmid in S. cerevisiae, DSM 9770, DSM10082, DSM 10080, DSM 10081, E. coli, DSM 10512, DSM 10511, DSM 10571 orDSM 10576, respectively.

Immunological Cross-reactivity

Antibodies to be used in determining immunological cross-reactivity maybe prepared by use of a purified cellulase. More specifically, antiserumagainst the cellulase of the invention may be raised by immunizingrabbits (or other rodents) according to the procedure described by N.Axelsen et al. in: A Manual of Quantitative Immunoelectrophoresis,Blackwell Scientific Publications, 1973, Chapter 23, or A. Johnstone andR. Thorpe, Immunochemistry in Practice, Blackwell ScientificPublications, 1982 (more specifically pp. 27-31). Purifiedimmunoglobulins may be obtained from the antisera, for example by saltprecipitation ((NH₄)₂ SO₄), followed by dialysis and ion exchangechromatography, e.g. on DEAE-Sephadex. Immunochemical characterizationof proteins may be done either by Outcherlony double-diffusion analysis(O. Ouchterlony in: Handbook of Experimental Immunology (D. M. Weir,Ed.), Blackwell Scientific Publications, 1967, pp. 655-706), by crossedimmunoelectrophoresis (N. Axelsen et al., supra, Chapters 3 and 4), orby rocket immunoelectrophoresis (N. Axelsen et al., Chapter 2).

Media

YPD: 10 g yeast extract, 20 g peptone, H₂O to 900 ml. Autoclaved, 100 ml20% glucose (sterile filtered) added.

YPM: 10 g yeast extract, 20 g peptone, H₂O to 900 ml. Autoclaved, 100 ml20% maltodextrin (sterile filtered) added.

10× Basal salt: 75 g yeast nitrogen base, 113 g succinic acid, 68 gNaOH, H₂O ad 1000 ml, sterile filtered.

SC-URA: 100 ml 10× Basal salt, 28 ml 20% casamino acids withoutvitamins, 10 ml 1% tryptophan, H₂O ad 900 ml, autoclaved, 3.6 ml 5%threonine and 100 ml 20% glucose or 20% galactose added.

SC-URA agar: SC-URA, 20 g/l agar added.

PD agar: 39 g potato dextrose agar, DIFCO 0013; add deionized water upto 1000 ml; autoclave (121° C. for 15-20 min).

PC agar: Potatoes and carrots (grinded, 20 g of each) and water, addedup to 1000 ml, are boiled for 1 hr; agar (20 g/l of Merck 1614);autoclave (121° C. for 20 min)

PC liquid broth: as PC agar but without the Agar

PD liquid broth: 24 g potato dextrose broth, Difco 0549, deionized waterup to 1000 ml; autoclave (121° C. for 15-20 min)

PC and PD liquid broth with cellulose: add 30 g Solcafloc (Dicacelavailable from Dicalite-Europe-Nord, 9000 Gent, Belgium) per 1000 ml

PB-9 liquid broth: 12 g Rofec (Roquette 101-0441) and 24 g glucose areadded to 1000 ml water; pH is adjusted to 5.5; 5 ml mineral oil and 5 gCaCo₃ are added per 1000 ml. Autoclave (121° C. for 40 min)

YPG liquid broth: 4 g yeast extract (Difco 0127), 1 g KH₂PO₄(Merck4873), 0.5 g MgSO₄.7H₂O Merck 5886, 15 g Dextrose, Roquette101-0441, 0.1 ml Pluronic (101-3088); deionized water up to 1000 ml;autoclave (20 min at 121° C.)

Dilute salt solution (DS): Make up two stock solutions: P-stock: 13.61 gKH₂PO₄; 13.21 g (NH₄)₂PO₄, 17.42 g KH₂PO₄; deionized water up to 100 mlCa/Mg stock: 7.35 g CaCl₂, 2H₂O, 10.17 g MgCl₂, 6H₂O, deionized water upto 100 ml; pH adjusted to 7.0; autoclaving (121° C.; 20 min)

Mix 0.5 ml P-stock with 0.1 ml Ca/Mg stock

add deionized water up to 1000 ml

AZCL HE cellulose (Megazyme, Australia).

Uses

During washing and wearing, dyestuff from dyed fabrics or garment willconventionally bleed from the fabric which then looks faded and worn.Removal of surface fibers from the fabric will partly restore theoriginal colours and looks of the fabric. By the term “colourclarification”, as used herein, is meant the partly restoration of theinitial colours of fabric or garment throughout multiple washing cycles.

The term “de-pilling” denotes removing of pills from the fabric surface.

The term “soaking liquor” denotes an aqueous liquor in which laundry maybe immersed prior to being subjected to a conventional washing process.The soaking liquor may contain one or more ingredients conventionallyused in a washing or laundering process.

The term “washing liquor” denotes an aqueous liquor in which laundry issubjected to a washing process, i.e. usually a combined chemical andmechanical action either manually or in a washing machine.Conventionally, the washing liquor is an aqueous solution of a powder orliquid detergent composition.

The term “rinsing liquor” denotes an aqueous liquor in which laundry isimmersed and treated, conventionally immediately after being subjectedto a washing process, in order to rinse the laundry, i.e. essentiallyremove the detergent solution from the laundry. The rinsing liquor maycontain a fabric conditioning or softening composition.

The laundry subjected to the method of the present invention may beconventional washable laundry. Preferably, the major part of the laundryis sewn or unsewn fabrics, including knits, wovens, denims, yarns, andtoweling, made from cotton, cotton blends or natural or manmadecellulosics (e.g. originating from xylan-containing cellulose fiberssuch as from wood pulp) or blends thereof. Examples of blends are blendsof cotton or rayon/viscose with one or more companion material such aswool, synthetic fibers (e.g. polyamide fibers, acrylic fibers, polyesterfibers, polyvinyl alcohol fibers, polyvinyl chloride fibers,polyvinylidene chloride fibers, polyurethane fibers, polyurea fibers,aramid fibers), and cellulose-containing fibers (e.g. rayon/viscose,ramie, flax/linen, jute, cellulose acetate fibers, lyocell).

Detergent Compositions

According to one aspect of the present invention, the presentendoglucanases may typically is be components of a detergentcomposition. As such, they may be included in the detergent compositionin the form of a non-dusting granulate, a stabilized liquid, orprotected enzymes. Non-dusting granulates may be produced, e.g., asdisclosed in U.S. Pat. Nos. 4,106,991 and 4,661,452 (both to NovoIndustri A/S) and may optionally be coated by methods known in the art.Examples of waxy coating materials are poly(ethylene oxide) products(polyethyleneglycol, PEG) with mean molecular weights of 1000 to 20000;ethoxylated nonylphenols having from 16 to 50 ethylene oxide units;ethoxylated fatty alcohols in which the alcohol contains from 12 to 20carbon atoms and in which there are 15 to 80 ethylene oxide units; fattyalcohols; fatty acids; and mono- and di- and triglycerides of fattyacids. Examples of film-forming coating materials suitable forapplication by fluid bed techniques are given in patent GB 1483591.Liquid enzyme preparations may, for instance, be stabilized by adding apolyol such as propylene glycol, a sugar or sugar alcohol, lactic acidor boric acid according to established methods. Other enzyme stabilizersare well known in the art. Protected enzymes may be prepared accordingto the method disclosed in EP 238,216.

The detergent composition of the invention may be in any convenientform, e.g. as powder, granules, paste or liquid. A liquid detergent maybe aqueous, typically containing up to 70% water and 0-30% organicsolvent, or nonaqueous.

The detergent composition comprises one or more surfactants, each ofwhich may be anionic, nonionic, cationic, or zwilterionic. The detergentwill usually contain 0-50% of anionic surfactant such as linearalkylbenzenesulfonate (LAS), alpha-olefinsulfonate (AOS), alkyl sulfate(fatty alcohol sulfate) (AS), alcohol ethoxysulfate (AEOS or AES),secondary alkanesulfonates (SAS), alpha-sulfo fatty acid methyl esters,alkyl- or alkenylsuccinic acid, or soap. It may also contain 0-40% ofnonionic surfactant such as alcohol ethoxylate (AEO or AE), carboxylatedalcohol ethoxylates, nonylphenol ethoxylate, alkylpolyglycoside,alkyldimethylamine oxide, ethoxylated fatty acid monoethanolamide, fattyacid monoethanolamide, or polyhydroxy alkyl fatty acid amide (e.g. asdescribed in WO 92/06154).

The detergent composition may additionally comprise one or more otherenzymes such as amylase, lipase, cutinase, protease, peroxidase, andoxidase, e.g. laccase.

The detergent may contain 1-65% of a detergent builder or complexingagent such as zeolite, diphosphate, triphosphate, phosphonate, citrate,nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA),diethylenetriaminepentaacetic acid (DTMPA), alkyl- or alkenylsuccinicacid, soluble silicates or layered silicates (e.g. SKS-6 from Hoechst).The detergent may also be unbuilt, i.e. essentially free of detergentbuilder.

The detergent may comprise one or more polymers. Examples arecarboxymethylcellulose (CMC), poly(vinylpyrrolidone) (PVP),polyethyleneglycol (PEG), poly(vinyl alcohol) (PVA), polycarboxylatessuch as polyacrylates, maleic/acrylic acid copolymers and laurylmethacrylate/acrylic acid copolymers.

The detergent may contain a bleaching system which may comprise a H₂O₂source such as perborate or percarbonate which may be combined with aperacid-forming bleach activator such as tetraacetylethylenediamine(TAED) or nonanoyloxybenzenesulfonate (NOBS). Alternatively, thebleaching system may comprise peroxyacids of, e.g., the amide, imide, orsulfone type.

The enzymes of the detergent composition of the invention may bestabilized using conventional stabilizing agents, e.g. a polyol such aspropylene glycol or glycerol, a sugar or sugar alcohol, lactic acid,boric acid, or a boric acid derivative such as, e.g., an aromatic borateester, and the composition may be formulated as described in, e.g., WO92/19709 and WO 92/19708.

The detergent may also contain other conventional detergent ingredientssuch as, e.g., fabric conditioners including clays, foam boosters, sudssuppressors, anti-corrosion agents, soil-suspending agents,anti-soil-redeposition agents, dyes, bactericides, optical brighteners,or perfume.

The pH (measured in aqueous solution at use concentration) will usuallybe neutral or alkaline, e.g. in the range of 7-11.

Particular forms of detergent compositions within the scope of theinvention include:

1) A detergent composition formulated as a granulate having a bulkdensity of at least 600 g/l comprising Linear alkylbenzenesulfonate(calculated as acid)  7-12% Alcohol ethoxysulfate (e.g. C₁₂₋₁₈ alcohol,1-2 EO) or 1-4% alkyl sulfate (e.g. C₁₆₋₁₈) Alcohol ethoxylate (e.g.C₁₄₋₁₅ alcohol, 7 EO) 5-9% Sodium carbonate (as Na₂CO₃) 14-20% Solublesilicate (as Na₂O, 2SiO₂) 2-6% Zeolite (as NaA1SiO₄) 15-22% Sodiumsulfate (as Na₂SO₄) 0-6% Sodium citrate/citric acid (asC₆H₅Na₃O₇/C₆H₈O₇)  0-15% Sodium perborate (as NaBO₃.H₂O) 11-18% TAED2-6% Carboxymethylcellulose 0-2% Polymers (e.g. maleic/acrylic acidcopolymer, 0-3% PVP, PEG) Enzymes (calculated as pure enzyme protein)0.0001-0.1%   Minor ingredients (e.g. suds suppressors, perfume, 0-5%optical brightener, photobleach) 2) A detergent composition formulatedas a granulate having a bulk density of at least 600 g/l comprisingLinear alkylbenzenesulfonate (calculated as acid)  6-11% Alcoholethoxysulfate (e.g. C₁₂₋₁₈ alcohol, 1-2 EO 1-3% or alkyl sulfate (e.g.C₁₆₋₁₈) Alcohol ethoxylate (e.g. C₁₄₋₁₅ alcohol, 7 EO) 5-9% Sodiumcarbonate (as Na₂CO₃) 15-21% Soluble silicate (as Na₂O, 2SiO₂) 1-4%Zeolite (as NaA1SiO₄) 24-34% Sodium sulfate (as Na₂SO₄)  4-10% Sodiumcitrate/citric acid (as C₆H₅Na₃O₇/C₆H₈O₇)  0-15% Carboxymethylcellulose0-2% Polymers (e.g. maleic/acrylic acid copolymer, 1-6% PVP, PEG)Enzymes (calculated as pure enzyme protein) 0.0001-0.1%   Minoringredients (e.g. suds suppressors, perfume) 0-5% 3) A detergentcomposition formulated as a granulate having a bulk density of at least600 g/l comprising Linear alkylbenzenesulfonate (calculated as acid)5-9% Alcohol ethoxylate (e.g. C₁₂₋₁₅ alcohol, 7 EO)  7-14% Soap as fattyacid (e.g. C₁₆₋₂₂ fatty acid) 1-3% Sodium carbonate (as Na₂CO₃) 10-17%Soluble silicate (as Na₂O, 2SiO₂) 3-9% Zeolite (as NaA1SiO₄) 23-33%Sodium sulfate (as Na₂SO4) 0-4% Sodium perborate (as NaBO₃.H₂O)  8-16%TAED 2-8% Phosphonate (e.g. EDTMPA) 0-1% Carboxymethylcellulose 0-2%Polymers (e.g. maleic/acrylic acid copolymer, 0-3% PVP, PEG) Enzymes(calculated as pure enzyme protein) 0.0001-0.1%   Minor ingredients(e.g. suds suppressors, perfume, 0-5% optical brightener) 4) A detergentcomposition formulated as a granulate having a bulk density of at least600 g/l comprising Linear alkylbenzenesulfonate (calculated as acid) 8-12% Alcohol ethoxylate (e.g. C₁₂₋₁₅ alcohol, 7 EO) 10-25% Sodiumcarbonate (as Na₂CO₃) 14-22% Soluble silicate (as Na₂O, 2SiO₂) 1-5%Zeolite (as NaA1SiO₄) 25-35% Sodium sulfate (as Na₂SO₄)  0-10%Carboxymethylcellulose 0-2% Polymers (e.g. maleic/acrylic acidcopolymer, 1-3% PVP, PEG) Enzymes (calculated as pure enzyme protein)0.0001-0.1%   Minor ingredients (e.g. suds suppressors, perfume) 0-5% 5)An aqueous liquid detergent composition comprising Linearalkylbenzenesulfonate (calculated as acid) 15-21% Alcohol ethoxylate(e.g. C₁₂₋₁₅ alcohol, 7 EO or C₁₂₋₁₅ 12-18% alcohol, 5 EO) Soap as fattyacid (e.g. oleic acid)  3-13% Alkenylsuccinic acid (C₁₂₋₁₄)  0-13%Aminoethanol  8-18% Citric acid 2-8% Phosphonate 0-3% Polymers (e.g.PVP, PEG) 0-3% Borate (as B₄O₇) 0-2% Ethanol 0-3% Propylene glycol 8-14% Enzymes (calculated as pure enzyme protein) 0.0001-0.1%   Minoringredients (e.g. dispersants, suds suppressors, 0-5% perfume, opticalbrightener) 6) An aqueous structured liquid detergent compositioncomprising Linear alkylbenzenesulfonate (calculated as acid) 15-21%Alcohol ethoxylate (e.g. C₁₂₋₁₅ alcohol, 7 EO, or 3-9% C₁₂₋₁₅ alcohol, 5EO) Soap as fatty acid (e.g. oleic acid)  3-10% Zeolite (as NaA1SiO₄)14-22% Potassium citrate  9-18% Borate (as B₄O₇) 0-2%Carboxymethylcellulose 0-2% Polymers (e.g. PEG, PVP) 0-3% Anchoringpolymers such as, e.g., lauryl methacrylate/ 0-3% acrylic acidcopolymer; molar ratio 25:1; MW 3800 Glycerol 0-5% Enzymes (calculatedas pure enzyme protein) 0.0001-0.1%   Minor ingredients (e.g.dispersants, suds suppressors, 0-5% perfume, optical brighteners) 7) Adetergent composition formulated as a granulate having a bulk density ofat least 600 g/l comprising Fatty alcohol sulfate  5-10% Ethoxylatedfatty acid monoethanolamide 3-9% Soap as fatty acid 0-3% Sodiumcarbonate (as Na₂CO₃)  5-10% Soluble silicate (as Na₂O, 2SiO₂) 1-4%Zeolite (as NaA1SiO₄) 20-40% Sodium sulfate (as Na₂SO₄) 2-8% Sodiumperborate (as NaBO₃.H₂O) 12-18% TAED 2-7% Polymers (e.g. maleic/acrylicacid copolymer, PEG) 1-5% Enzymes (calculated as pure enzyme protein)0.0001-0.1%   Minor ingredients (e.g. optical brightener, suds 0-5%suppressors, perfume) 8) A detergent composition formulated as agranulate comprising Linear alkylbenzenesulfonate (calculated as acid) 8-14% Ethoxylated fatty acid monoethanolamide  5-11% Soap as fatty acid0-3% Sodium carbonate (as Na₂CO₃)  4-10% Soluble silicate (as Na₂O,2SiO₂) 1-4% Zeolite (as NaA1SiO₄) 30-50% Sodium sulfate (as Na₂SO₄) 3-11% Sodium citrate (as C₆H₅Na₃O₇)  5-12% Polymers (e.g. PVP,maleic/acrylic acid copolymer, 1-5% PEG) Enzymes (calculated as pureenzyme protein) 0.0001-0.1%   Minor ingredients (e.g. suds suppressors,perfume) 0-5% 9) A detergent composition formulated as a granulatecomprising Linear alkylbenzenesulfonate (calculated as acid)  6-12%Nonionic surfactant 1-4% Soap as fatty acid 2-6% Sodium carbonate (asNa₂CO₃) 14-22% Zeolite (as NaA1SiO₄) 18-32% Sodium sulfate (as Na₂SO₄) 5-20% Sodium citrate (as C₆H₅Na₃O₇) 3-8% Sodium perborate (asNaBO₃.H₂O) 4-9% Bleach activator (e.g. NOBS or TAED) 1-5%Carboxymethylcellulose 0-2% Polymers (e.g. polycarboxylate or PEG) 1-5%Enzymes (calculated as pure enzyme protein) 0.0001-0.1%   Minoringredients (e.g. optical brightener, perfume) 0-5% 10) An aqueousliquid detergent composition comprising Linear alkylbenzenesulfonate(calculated as acid) 15-23% Alcohol ethoxysulfate (e.g. C₁₂₋₁₅ alcohol,2-3 EO)  8-15% Alcohol ethoxylate (e.g. C₁₂₋₁₅ alcohol, 7 EO, 3-9% orC₁₂₋₁₅ alcohol, 5 EO) Soap as fatty acid (e.g. lauric acid) 0-3%Aminoethanol 1-5% Sodium citrate  5-10% Hydrotrope (e.g. sodiumtoluensulfonate) 2-6% Borate (as B₄O₇) 0-2% Carboxymethylcellulose 0-1%Ethanol 1-3% Propylene glycol 2-5% Enzymes (calculated as pure enzymeprotein) 0.0001-0.1%   Minor ingredients (e.g. polymers, dispersants,perfume, 0-5% optical brighteners) 11) An aqueous liquid detergentcomposition comprising Linear alkylbenzenesulfonate (calculated as acid)20-32% Alcohol ethoxylate (e.g. C₁₂₋₁₅ alcohol, 7 EO, or  6-12% C₁₂₋₁₅alcohol, 5 EO) Aminoethanol 2-6% Citric acid  8-14% Borate (as B₄O₇)1-3% Polymer (e.g. maleic/acrylic acid copolymer, anchoring 0-3% polymersuch as, e.g., lauryl methacrylate-/acrylic acid copolymer) Glycerol3-8% Enzymes (calculated as pure enzyme protein) 0.0001-0.1%   Minoringredients (e.g. hydrotropes, dispersants, 0-5% perfume, opticalbrighteners) 12) A detergent composition formulated as a granulatehaving a bulk density of at least 600 g/l comprising Anionic surfactant(linear alkylbenzenesulfonate, alkyl 25-40% sulfate,alpha-olefinsulfonate, alpha-sulfo fatty acid methyl esters,alkanesulfonates, soap) Nonionic surfactant (e.g. alcohol ethoxylate) 1-10% Sodium carbonate (as Na₂CO₃)  8-25% Soluble silicates (as Na₂O,2SiO₂)  5-15% Sodium sulfate (as Na₂SO₄) 0- 5% Zeolite (as NaA1SiO₄)15-28% Sodium perborate (as NaBO₃.4H₂O)  0-20% Bleach activator (TAED orNOBS) 0-5% Enzymes (calculated as pure enzyme protein) 0.0001-0.1%  Minor ingredients (e.g. perfume, optical brighteners) 0-3% 13) Detergentformulations as described in 1)-12) wherein all or part of the linearalkylbenzenesulfonate is replaced by (C₁₂-C₁₈) alkyl sulfate. 14) Adetergent composition formulated as a granulate having a bulk density ofat least 600 g/l comprising (C₁₂-C₁₈) alkyl sulfate  9-15% Alcoholethoxylate 3-6% Polyhydroxy alkyl fatty acid amide 1-5% Zeolite (asNaA1SiO₄) 10-20% Layered disilicate (e.g. SK56 from Hoechst) 10-20%Sodium carbonate (as Na₂CO₃)  3-12% Soluble silicate (as NaO, 2SiO₂)0-6% Sodium citrate 4-8% Sodium percarbonate 13-22% TAED 3-8% Polymers(e.g. polycarboxylates and PVP = 0-5% Enzymes (calculated as pure enzymeprotein) 0.0001-0.1%   Minor ingredients (e.g. optical brightener, photo0-5% bleach, perfume, suds suppressors) 15) A detergent compositionformulated as a granulate having a bulk density of at least 600 g/lcomprising (C₁₂-C₁₈) alkyl sulfate 4-8% Alcohol ethoxylate 11-15% Soap1-4% Zeolite MAP or zeolite A 35-45% Sodium carbonate (as Na₂CO₃) 2-8%Soluble silicate (as Na₂O, 2SiO₂) 0-4% Sodium percarbonate 13-22% TAED1-8% Carboxymethyl cellulose 0-3% Polymers (e.g. polycarboxylates andPVP) 0-3% Enzymes (calculated as pure enzyme protein) 0.0001-0.1%  Minor ingredients (e.g. optical brightener, 0-3% phosphonate, perfume)

-   16) Detergent formulations as described in 1)-15) which contain a    stabilized or encapsulated peracid, either as an additional    component or as a substitute for already specified bleach systems.-   17) Detergent compositions as described in 1), 3), 7), 9) and 12)    wherein perborate is replaced by percarbonate.-   18) Detergent compositions as described in 1), 3), 7), 9), 12), 14)    and 15) which additionally contain a manganese catalyst. The    manganese catalyst may, e.g., be one of the compounds described in    “Efficient manganese catalysts for low-temperature bleaching”,    Nature 369, 1994, pp. 637-639.-   19) Detergent composition formulated as a nonaqueous detergent    liquid comprising a liquid nonionic surfactant such as, e.g., linear    alkoxylated primary alcohol, a builder system (e.g. phosphate),    enzyme and alkali. The detergent may also comprise anionic    surfactant and/or a bleach system.

The endoglucanase may be incorporated in concentrations conventionallyemployed in detergents. It is at present contemplated that, in thelaundry composition of the invention, the cellulase may be added in anamount corresponding to 0.0001-10 mg (calculated as pure enzyme protein)of cellulase per liter of wash liquor.

According to yet another aspect of the present invention, endoglucanasemay typically be a component of a fabric conditioning or softenercomposition. Examples of conventional softener compositions aredisclosed in e.g. EP 0 233 910.

Textile Applications

In another embodiment, the present invention relates to use of theendoglucanase of the invention in the bio-polishing process.Bio-Polishing is a specific treatment of the yarn surface which improvesfabric quality with respect to handle and appearance without loss offabric wettability. The most important effects of Bio-Polishing can becharacterized by less fuzz and pilling, increased gloss/luster, improvedfabric handle, increased durable softness and altered water absorbency.Bio-Polishing usually takes place in the wet processing of themanufacture of knitted and woven fabrics. Wet processing comprises suchsteps as e.g. desizing, scouring, bleaching, washing, dying/printing andfinishing. During each of these steps, the fabric is more or lesssubjected to mechanical action. In general, after the textiles have beenknitted or woven, the fabric proceeds to a desizing stage, followed by ascouring stage, etc. Desizing is the act of removing size from textiles.Prior to weaving on mechanical looms, warp yarns are often coated withsize starch or starch derivatives in order to increase their tensilestrength. After weaving, the size coating must be removed before furtherprocessing the fabric in order to ensure a homogeneous and wash-proofresult. It is known that in order to achieve the effects ofBio-Polishing, a combination of cellulytic and mechanical action isrequired. It is also known that “super-softness” is achievable when thetreatment with a cellulase is combined with a conventional treatmentwith softening agents. It is contemplated that use of the endoglucanaseof the invention for bio-polishing of cellulosic fabrics isadvantageous, e.g. a more thorough polishing can be achieved.Bio-polishing may be obtained by applying the method described e.g. inWO 93/20278.

Stone-washing

It is known to provide a “stone-washed” look (localized abrasion of thecolour) in dyed fabric, especially in denim fabric or jeans, either bywashing the denim or jeans made from such fabric in the presence ofpumice stones to provide the desired localized lightening of the colourof the fabric or by treating the fabric enzymatically, in particularwith cellulytic enzymes. The treatment with an endoglucanase of thepresent invention may be carried out either alone such as disclosed inU.S. Pat. No. 4,832,864, together with a smaller amount of pumice thanrequired in the traditional process, or together with perlite such asdisclosed in WO 95/09225.

Pulp and Paper Applications

In the papermaking pulp industry, the endoglucanase of the presentinvention may be applied advantageously e.g. as follows:

-   -   For debarking: pretreatment with the endoglucanase may degrade        the cambium layer prior to debarking in mechanical drums        resulting in advantageous energy savings.    -   For defibration: treatment of a material containing cellulosic        fibers with the endoglucanase prior to refining or beating may        result in reduction of the energy consumption due to the        hydrolysing effect of the cellulase on the interfibre surfaces.        Use of the endoglucanase may result in improved energy savings        as compared to the use of known enzymes, since it is believed        that the enzyme composition of the invention may possess a        higher ability to penetrate fibre walls.    -   For fibre modification, i.e. improvement of fibre properties        where partial hydrolysis across the fibre wall is needed which        requires deeper penetrating enzymes (e.g. in order to make        coarse fibers more flexible). Deep treatment of fibers has so        far not been possible for high yield pulps e.g. mechanical pulps        or mixtures of recycled pulps. This has been ascribed to the        nature of the fibre wall structure that prevents the passage of        enzyme molecules due to physical restriction of the pore matrix        of the fibre wall. It is contemplated that the present        endoglucanase is capable of penetrating into the fibre wall.    -   For drainage improvement. The drainability of papermaking pulps        may be improved by treatment of the pulp with hydrolysing        enzymes, e.g. cellulases. Use of the present endoglucanase may        be more effective, e.g. result in a higher degree of loosening        bundles of strongly hydrated micro-fibrils in the fines fraction        (consisting of fibre debris) that limits the rate of drainage by        blocking hollow spaces between fibers and in the wire mesh of        the paper machine. The Canadian standard freeness (CSF)        increases and the Schopper-Riegler drainage index decreases when        pulp in subjected to cellulase treatment, see e.g. U.S. Pat. No.        4,923,565; TAPPI T227, SCAN C19:65.ence.    -   For inter fibre bonding. Hydrolytic enzymes are applied in the        manufacture of papermaking pulps for improving the inter fibre        bonding. The enzymes rinse the fibre surfaces for impurities        e.g. cellulosic debris, thus enhancing the area of exposed        cellulose with attachment to the fibre wall, thus improving the        fibre-to-fibre hydrogen binding capacity. This process is also        referred to as dehornification. Paper and board produced with a        cellulase containing enzyme preparation may have an improved        strength or a reduced grammage, a smoother surface and an        improved printability.    -   For enzymatic deinking. Partial hydrolysis of recycled paper        during or upon pulping by use of hydrolysing enzymes such as        cellulases are known to facilitate the removal and agglomeration        of ink particles. Use of the present endoglucanse may give a        more effective loosening of ink from the surface structure due        to a better penetration of the enzyme molecules into the        fibrillar matrix of the fibre wall, thus softening the surface        whereby ink particles are effectively loosened. The        agglomeration of loosened ink particles are also improved, due        to a more efficient hydrolysis of cellulosic fragments found        attached to ink particles originating from the fibres.

The treatment of lignocellulosic pulp may, e.g., be performed asdescribed in WO 91/14819, WO 91/14822, WO 92/17573 and WO 92/18688.

Degradation of Plant Material

In yet another embodiment, the present invention relates to use of theendoglucanase and/or enzyme preparation according to the invention fordegradation of plant material e.g. cell walls.

It is contemplated that the novel endoglucanase and/or enzymepreparation of the invention is useful in the preparation of wine, fruitor vegetable juice in order to increase yield. Endoglucanases accordingto the invention may also be applied for enzymatic hydrolysis of variousplant cell-wall derived materials or waste materials, e.g. agriculturalresidues such as wheat-straw, corn cobs, whole corn plants, nut shells,grass, vegetable hulls, bean hulls, spent grains, sugar beet pulp, andthe like. The plant material may be degraded in order to improvedifferent kinds of processing, facilitate purification or extraction ofother components like purification of beta-glucan or beta-glucanoligomers from cereals, improve the feed value, decrease the waterbinding capacity, improve the degradability in waste water plants,improve the conversion of e.g. grass and corn to ensilage, etc.

The following examples illustrate the invention.

EXAMPLE 1

Cellulytic enzymes from 4 fungi, belonging to 3 families under twoorders within the Ascomycetes were detected by expression cloning;corresponding DNA sequences were determined; the enzymes heterologouslyexpressed, and produced by liquid fermentation, characterized anddemonstrated to give good performance in colour clarification assays.

Isolate CBS 117.65, CBS 478.94, NRRL 8126, and ATCC 10523 were grown inshake flask cultures on cellulose enriched potato dextrose broth,incubated for 5 days at 26°C. (shaking) conditions, 150 rpm).

A. Cloning and Expression of an Endoglucanase from Myceliophthorathermophila, Acremonium sp., and Thielavia terrestris and Volutellacolletotrichoides

mRNA was isolated from Myceliophthora thermophila, Acremonium sp.,Thielavia terrestris and Volutella colletotrichoides, respectively,grown in a cellulose-containing fermentation medium with agitation toensure sufficient aeration. Mycelia were harvested after 3-5 days'growth, immediately frozen in liquid nitrogen and stored at −80□ C.Libraries from Myceliophthora thermophila, Acremonium sp., Thielaviaterrestris and Volutella colletotrichoides, respectively, eachconsisting of approx. 10⁶ individual clones were constructed in E. colias described with a vector background of 1%.

Plasmid DNA from some of the pools from each library was transformedinto yeast, and 50-100 plates containing 250-400 yeast colonies wereobtained from each pool.

Endoglucanase-positive colonies were identified and isolated on SC-agarplates with the AZCL HE cellulose assay. cDNA inserts were amplifieddirectly from the yeast colonies and characterized as described in theMaterials and Methods section above.

The DNA sequence of the cDNA encoding the endoglucanase fromMyceliophthora thermophila is of SEQ ID NO: 1 and the correspondingamino acid sequence is also of SEQ ID NO: 2. The cDNA is obtainable fromthe plasmid in DSM 9770.

The DNA sequence of the cDNA encoding the endoglucanase from Acremoniumsp. is of SEQ ID NO: 7 and the corresponding amino acid sequence is ofSEQ ID NO: 8. The cDNA is obtainable from the plasmid in DSM 10082.

The DNA sequence of the cDNA encoding the endoglucanase from Thielaviaterrestris is of SEQ ID NO: 11 and the corresponding amino acid sequenceis of SEQ ID NO: 12. The cDNA is obtainable from the plasmid in DSM10081.

The DNA sequence of the cDNA encoding the endoglucanase from Volutellacolletotrichoides is of SEQ ID NO: 21 and the corresponding amino acidsequence is of SEQ ID NO: 22. The cDNA is obtainable from the plasmid inDSM 10571.

Total DNA was isolated from a yeast colony and plasmid DNA was rescuedby transformation of E. coli as described above. In order to express theendoglucanases in Aspergillus, the DNA was digested with appropriaterestriction enzymes, size fractionated on gel, and a fragmentcorresponding to the endoglucanase gene from Myceliophthora thermophila,Acremonium sp., Thielavia terrestris and Volutella colletotrichoides,respectively, was purified. The genes were subsequently ligated topHD414, digested with appropriate restriction enzymes, resulting in theplasmids pA2C193, pA2C357, pA2C385 and pA2C488, respectively.

After amplification of the DNA in E. coli the plasmids were transformedinto Aspergillus oryzae as described above.

Test of A. oryzae Transformants

Each of the transformants were tested for endoglucanase activity asdescribed above. Some of the transformants had endoglucanase activitywhich was significantly larger than the Aspergillus oryzae background.This demonstrates efficient expression of the endoglucanases inAspergillus oryzae. The transformants with the highest endoglucanaseactivity were selected and inoculated in a 500 ml shake flask with YPMmedia. After 3-5 days of fermentation with sufficient agitation toensure good aeration, the culture broth was centrifuged for 10 minutesat 2000 g and the supernatant recovered.

B. Determination of Endoglucanase Activity

The cellulytic activity of the endoglucanase may be determined relativeto an analytical standard and expressed in the unit S-CEVU.

Cellulytic enzymes hydrolyse CMC, thereby decreasing the viscosity ofthe incubation mixture. The resulting reduction in viscosity may bedetermined by a vibration viscosimeter (e.g. MIVI 3000 from Sofraser,France).

Determination of the cellulytic activity, measured in terms of S-CEVU,may be determined according to the analysis method AF 301.1 which isavailable from the Applicant upon request.

The S-CEVU assay quantifies the amount of catalytic activity present inthe sample by measuring the ability of the sample to reduce theviscosity of a solution of carboxy-methylcellulose (CMC). The assay iscarried out at 40° C., pH 7.5 using a relative enzyme standard forreducing the viscosity of the CMC substrate.

Assay for determination of endoglucanase activity in terms of SAVI unitsusing phosphoric-acid swollen cellulose (PASC): Definition: 1 SAVI-U isthe amount of enzyme which forms an amount of reducing carbohydratesequivalent to 1 μmol of glucose per minute.

Assay Condition

Enzyme solution: 0.5 ml

4 g/l PASC in 0, 1 M Buffer: 2.0 ml

20 min, 40° C.

Sensitivity

Max 0.1 SAVIU/ml=approx. 1 S-CEVU/ml (CMC viscosity)

Min 0.01 SAVIU/ml=approx. 0.1 S-CEVU/ml

Determination of Formation of Reducing Sugars:

The reducing groups assay was performed according to Lever, M. A newreaction for colormetric determination of carbohydrates. Anal. Biochem.1972. Vol 47 (273-279). Reagent mixture was prepared by mixing 1,5 gramp-hydroxybenzoic-acide hydracide (PHBAH) with 5 gram sodium tartrate in100 ml 2% sodium hydroxide.

Substrate

PASC stock solution was prepared the following way using ice coldacetone and phosphoric acid. 5 gram of cellulose (Avicel®) was moisteredwith water, and 150 ml ice cold 85% ortho-phosphoric acid was added. Themixture was placed in ice bath under slow stirring for 1 hr. Then 100 mlice cold acetone was added with stirring. The slurry was transferred toa Buchner filter with pyrex sintered disc number 3 and then washed threetimes with 100 ml ice cold acetone, and sucked as dry as possible aftereach wash. Finally, the filter cake was washed twice with 500 ml water,sucked as dry as possible after each wash. The PASC was mixed withdeionized water to a total volume of 300 ml, blended to homogeneity(using the Ultra Turrax Homogenizer) and stored in refrigerator (up toone month).

Substrate equilibration with buffer: 20 gram phosphoric acid swollencellulose PASC stock solution was centrifuged for 20 min at 5000 rpm.,the supernatant was poured of; the sediment was resuspended in 30 ml ofbuffer and centrifuged for 20 min. at 5000 rpm., the supernatant waspoured of, and the sediment was resuspended in buffer to a total of 60 gcorresponding to a substrate concentration of 5 g cellulose/liter.

-   Buffer for pH 8.5 determination: 0.1 M Barbital.-   Buffer for pH 10 determination: 0.1 M Glycine.    Procedure:-   1. Dilution of enzyme samples

The enzyme solution is diluted in the same buffer as the substrate.

-   2. Enzyme reaction

The substrate in buffer solution is preheated for 5 min. at 40° C. (2ml). Then the enzyme solution (diluted to between 0.2 and 1 S-CEVU/ml)0.5 ml is added and mixed for 5 sec. Enzymes blanks are obtained byadding the stop reagent before enzyme solution. Incubate for 20 min. at40° C. The reaction is stopped by adding 0.5 ml 2% NaOH solution andmixing for 5 sec.

The samples are centrifuged for 20 min. at 5000 rpm. 1 ml supernatant ismixed with 0.5 ml PHBAH reagent and boiled for 10 min. The test tubesare cooled in an ice water bath.

-   3. Determination of reducing end groups:

The absorbancy at 410 nm is measured using a spectrophotometer. Blanksare prepared by adding sodium hydroxide before adding enzyme solution.

A standard glucose curve was obtained by using glucose concentrations of5, 10, 15 and 25 mg/l in the same buffer and adding PHBAH reagent beforeboiling. The release of reducing glucose equivalent is calculated usingthis standard curve.

-   4. Calculation of catalytic activity:

Measure absorbance at 410 nm

-   1) Standard curve    -   (Glucose)—(H₂O) vs concentration of glucose-   2) Enzyme sample    -   (Sample)—(Blank)        Calculate Glucose Concentration According to a Standard Curve        ${Activity}\quad\left( {{SAVIU}/{ml}} \right)\text{:}\quad\frac{X\quad\left( {{mg}\quad{{glucose}/l}} \right)*{Dilution}}{180.16\quad\left( {{MW}\quad{of}\quad{glucose}} \right)*20\quad\left( \min \right)}$

C. Purification and Characterisation of the Endoglucanase from M.thermophila

Aspergillus oryzae transformed with pA2C193 was grown on YPM medium for4 days. The liquid was then centrifuged and sterile filtered.

The sample was concentrated by ultrafiltration on AMICON cells using aDOW membrane GR61 PP with cut-off 20 kD. The Uf-concentrate was analyzedfor S-CEVU/ml and SaviU/ml with the following result:

UF-concentrate S-CEVU/ml SaviU/ml 9.25 ml 570 41Purification

2 ml of the UF-concentrate was diluted 5 times to lower the ionicstrength and filtered through 0.22 μm disk filter. This sample wasapplied to a Mono Q® HR5/5 Pharmacia column, equilibrated with 50 mMTris/HCl buffer, pH 7.5, (buffer A) and a flow of 1 ml/min. After washto baseline, with buffer A, the column was eluted with a Tris/HClbuffer, pH 7.5, containing 1 M NaCl (buffer B), the elution gradient was0-50% buffer B in 1 hour.

After 36 min. a peak complex showed up, 1 ml fractions were picked upand the first 10 fractions showed cellulase activity onCMC/Agarose/congo-red plates.

These fractions were pooled and concentrated, by ultrafiltration onAMICON cells using a DOW membrane GR61PP with cut-off 20 kD, to 3 ml.

This sample was applied to a HiLoad 26/60 Superdex 75™ prep gradePharmacia column, equilibrated with 100 mM Na-Acetate buffer, pH 6.35,and a 1 ml/min flow.

After 82 min. a peak showed up, 1 ml fractions were picked up and thefirst 10 fractions showed cellulase activity on CMC/Agarose/congo-redplates.

These fractions were pooled and the following results were obtained:

-   A₂₈₀=0.15-   A₂₈₀/A₂₆₀=1.62-   Mw(SDS)=22 kD-   pl=3.5-5-   Purity on SDS-PAGE=100%-   S-CEVU/ml=28.5-   S-CEVU/A₂₈₀=188-   S-CEVU/mg=436-   Extinction coefficient=54880 (calculated)-   Mw(calculated)=22 kD

The Extinction coefficient is based on the content of tyrosine,tryptophane and cystein calculated from the sequence of SEQ ID NO: 2(the amino acid sequence). SDS-Page was performed on NOVEX Pre-Cast Gels4-20% Tris-Glycine Gel 1.0 mm×10 Well.

IEF was performed on Pharmacia PAGplate pH 3.5-9.5, the activity wasvisualized by CMC-Congored overlaying.

Determination of K_(M) & k_(cat): k_(m) and k_(cat) was determined inthe same manner as the determination of SAVI Units at pH 8.5 with asubstrate concentration up to 8 g/l.

The following results were obtained:

-   k_(cat) 38 per sec.-   k_(m) 5 g/l,-   phosporic acid swollen cellulose, pH 8.5.-   Specific activity on CMC at pH 7.5:-   436 S-CEVU per mg protein.

D. Determination of pH and Temperature Profile of the Endoglucanase fromM. thermophila

The pH profile was determined at the following conditions:

Buffers of pH values between 2.5 and 10.0 were made by mixing 0.1 MTri-sodium phosphate with 0.1 M citric acid. Purified endoglucanase wasdiluted to ensure the assay response to be within the linear range ofthe assay. The substrate was a 0.4% suspension of AZCL-HE-cellulose(MegaZyme) mixed 1:1 with the citrate/phosphate buffer to a finalsubstrate concentration of 0.2% AZCL-HE-cellulose. 1 ml substrate inEppendorf® 1.5 ml polypropylene tubes were added 10 μl of enzymesolution and incubated for 15 minutes in Eppendorf® temperaturecontrolled Thermomixers before heat-inactivation of enzymes for 20minutes at 95° C. in a separate Thermomixer. The tubes were centrifugedand 200 μl of each supernatant was transferred to a well in a 96 wellmicrotiter plate and OD was measured at 620 nm in an ELISA reader(Labsystems Multiskan® MCC/340).

For the pH optimum incubations took place at 30° C. For each pH value,three tubes were added enzyme and incubated before heat-inactivation,whereas one tube (the blank) was added enzyme and heat-inactivatedimmediately. The mean value of the three incubated samples wascalculated and the blank value was substracted.

The following pH profile was determined:

PH Relative Activity 2.5 <10%   3 <10%   3.5 22% 4 87% 4.5 89% 5 100%  694% 6.5 86% 7 78% 7.5 73% 8 68% 8.5 54% 9 31% 10 18%

It is seen that the endoglucanase has more than 60% activity between pH4.0 and 8.0 and optimal activity at pH 5.0-6.0.

Temperature Profile:

The temperature optimum was determined in the same manner at pH 5.5. Thetemperatures ranged from 30° C. to 80° C. For each temperature threeincubations were carried out and the mean calculated. Three blanks wereproduced by immediate heat-inactivation of enzyme and the mean wassubtracted from the incubated sample values.

It is seen that the endoglucanase has optimal activity at 50-70° C.

Temp. (° C.) 30 40 50 60 70 80 Relative Activity 74% 77% 99% 100% 93%62%

The temperature stability was determined in the same manner at pH 5.5and 30° C., and, further, the enzyme solutions were preheated for 1 hourat the actual temperature and cooled on ice. The residual activity isshown below in % of the activity of a non-preheated enzyme sample:

Temp. (° C.) 40 50 60 70 80 Relative Activity 95% 84% 92% 86% 24%

E. Color Clarification of Myceliophthora Cellulase (SEQ ID NO: 2)Measured as Removal of Surface Fibrils and Fibers Protruding from theYarn of a Textile Containing Cellulosic Fibers

Apparatus Terg-o-tometer Liquid volume 100 ml Agitation 150movements/min with vertical stirrer Rinse time 5 min in tapwater Washingtemp 40° C. Washing liqour 0.05 M phosphate buffer pH 7.0 Washing time30 min Repetitions 2 Enzymes Myceliophthora SEQ ID NO: 2 Dosage 500 and2500 S-CEVU/l Textile 2 swatches of aged black 100% cotton 5 × 6 cm (0.9gram) Drying Tumble dry Evaluation The light remission is measured by aDatacolor Elrepho Remission spectrophotometer. Remission is calculatedas delta L (Hunter Lab-values). When the surface fibrils and fibersprotruding from the yarn are removed by the cellulase, the surface ofthe black fabric appears darker, and lower L values are obtained.

The sample is compared with a blind sample, i.e. washed without enzyme:

No cellulase 500 ECU/l 2500 ECU/l 0.00 −1.41 −1.91Delta L-values compared to blind sample.

The data shows that Myceliophthora cellulase without CBD gives goodcolor clarification under the conditions tested.

F. Construction of the Gene Fusions Between the Endoglucanase fromMyceliophthora thermophila and the 43 kD Endoglucanase from Humicolainsolens

The purpose of the two constructions was to make derivatives of theendoglucanase from M. thermophila with the linker and CBD from the 43 kDendoglucanase from H. insolens (disclosed in WO 91/17243). The nativeendoglucanase from M. thermophila do not have a linker and/or acellulose binding domain, CBD.

CM1: Construction 1 consists of the endoglucanase from M. thermophila(225 amino acids) and the 72 C-terminal amino acids from the H. insolens43 kD endoglucanase.

CM2: Construction 2 consists of the endoglucanase from M. thermophila(225 amino acids) and the 83 C-terminal amino acids from the H. insolens43 kD endoglucanase.

The 43 kD endoglucanase cDNA from H. insolens was cloned into pHD414 insuch a way that the endoglucanase gene was transcribed from theTaka-promoter. The resulting plasmid was named pCaHj418.

In a similar way the cDNA encoding the endoglucanase from M. thermophilawas cloned into pHD414 and the resulting plasmid was named pA2C193.

Primers: primer 1:5′-CGGAGCTCACGTCCAAGAGCGGCTGCTCCCGTCCCTCCAGCAGCACCAGCTCTCCGG-3′ (SEQ IDNO:88) primer 2:5′-CCGGAGAGCTGGTGCTGCTGGAGGGACGGGAGCAGCCGCTCTTGGACGTGAGCTCCG-3′ (SEQ IDNO:89) primer 3:5′-CGGAGCTCACGTCCAAGAGCGGCTGCTCCCGTAACGACGACGGCAACTTCCCTGCCG-3′ (SEQ IDNO:90) primer 4:5′-CGGCAGGGAAGTTGCCGTCGTCGTTACGGGAGCAGCCGCTCTTGGACGTGAGCTCCG-3′ (SEQ IDNO:91) Taka-pro. primer: 5′-CAACATCACATCAAGCTCTCC-3′ (SEQ ID NO:92)AMG-term. primer: 5′-CCCCATCCTTTAACTATAGCG-3′ (SEQ ID NO:93)

The endoglucanase fusions were constructed by the PCR overlap-extensionmethod as described by Higuchi et al. 1988.

Construction 1:

-   Reaction A: The Polymerase Chain Reaction (PCR) was used to amplify    the fragment of pCaHj418 between primer 1 and AMG-term, primer (the    linker and CBD from the 43 kD endoglucanase from H. insolens).-   Reaction B: PCR amplification of the fragment between Taka-pro.    primer and primer 2 in pA2C193, the endoglucanase gene from M.    thermophila.-   Reaction C: The two purified fragments were used in a third PCR in    the presence of the primers flanking the total region, i.e.    Taka-pro. primer and AMG-term. primer.    Construction 2:

The same procedure was used where primer 3 and primer 4 had replacedrespectively primer 1 and primer 2.

The fragment amplified in reaction C was purified, digested withrestriction enzymes Xba I and BsstE II. The purified digested fragmentwas ligated into pA2C193 digested with restriction enzymes Xba I andBsstE II.

Competent cells from E. coli strain DH5αF′ (New England Biolabs.) weretransformed with the ligated plasmid and colonies containing the genefusion were isolated. The sequence of the cloned part was verified byDNA sequencing.

The sequence of the gene in the two constructs are of SEQ ID NO: 3 andSEQ ID NO: 5.

Polymerase Chain Reactions were carried out under standard conditions,as recommended by Perkin-Elmer.

Reaction A and B started with 2 min. at 94° C. followed by 20 cycles of(30 sec. at 94° C., 30 sec. at 50° C. and 1 min. at 72° C.) and end with4 min. at 72° C.

Reaction C started with (2 min. at 94° C., 1 min. at 52° C. and 2 min.at 72° C.), followed by 15 cycles of (30 sec. at 94° C., 30 sec. at 52°C. and 90 sec. at 72° C.) and end with 4 min. At 72° C.

The two constructs were transformed into Aspergillus oryzae as describedabove.

G. Purification and Characterisation of Cloned Cellulases with CelluloseBinding Domains

The cloned product is recovered after fermentation by separation of theextracellular fluid from the production organism.

About one gram of cellulase is then highly purified by affinitychromatography using 150 gram of Avicel in a slurry with 20 mmSodium-phosphate pH 7.5.

The Avicel is mixed with the crude fermentation broth, which containstotal about 1 gram of cellulase. After mixing at 4° C. for 20 min theAvicel enzyme is packed into a column with a dimension of 50 times 200mm about 400 ml total.

The column is washed with the 200 ml buffer, then washed with 0.5 M NaClin the same buffer until no more protein elutes. Then washed with 500 ml20 mm Tris pH 8.5. Finally the pure full length enzyme is eluted with 1%triethylamine pH 11.8.

The eluted enzyme solution is adjusted to pH 8 and concentrated using aAmicon cell unit with a membrane DOW GR61PP (polypropylene with a cutoff of 20 KD) to above 5 mg protein per ml.

The purified cellulases were characterised as follow:

Mw pl Molar E.280 S-CEVU per A.280 SDS-PAGE Myceliophthora (SEQ ID NO:4)43 kD 4 74.950 135 Acremonium (SEQ ID NO:8) 40 kD 5 68.020 185 Thielavia(SEQ ID NO:12) 35 kD 4.3 52.470 75 pH Activity Thermostability above 50%N-terminal DSC Myceliophthora (SEQ ID NO:4) 5.0-9.0 Blocked. 80° C.Acremonium (SEQ ID NO:8) 6.0-9.5 Blocked. 61° C. Thielavia (SEQ IDNO:12) 5.0-9.0 ASGSG- 83° C.

The purified cellulases was analysed for MW by SDS-PAGE and usingstandard LMW protein marker kit from Pharmacia the MW was calculated forthe cellulases. The MW is apparently higher than the MW of thecomposition of the coding amin acids and is due to the fact the linkerregion are O-glycosylated resulting in this higher MW. The pl wasdetermined using a Pharmacia Ampholine PAG plates pH 3.5 to 9.5 andagain using a Pharmacia kit with known pl proteins.

The molar extinction coefficient was calculated based on the amin acidscomposition using the known absorbance of Tryptophan, Tyrosine andCystein. pH activity profile was obtained using CMC substrate,incubation for 20 min at 40° C. at a 0.5 pH interval and measuring theformation of reducing sugars. The relative activity at the different pHwas calculated and the table contains the interval with more than 50%relative activity has been measured.

The N-terminal was determined for the purified cellulase using a AppliedBiosystems model 473A sequencer. The protein sequenceer was runaccording to the manufacturer instructions.

Two of the cellulases were blocked, this is due to the N-terminalglutamine which forms a pyroglutamate which can not be detected andwhich blocks further sequencing.

Differential scanning calorimetry (“DSC”) was done at neutral pH (7.0)using a MicroCalc Inc. MC calorimeter with a constant scan rate andraising the temperature from 20 to 90° C. at a rate of 90° per hour.

Raising antibody. The cellulases from Myceliophthora, Acremonium andThielavia were used for raising antibody in rabbits. 0.1 mg of thepurified cellulase in 0.9% NaCl solution mixed with Freunds adjuvantimmediately prior to injection. The rabbits were immunized 10 times withone week interval. The immunoglobulin G fraction (IgG) was purified byammonium sulfate precipitation (25% saturation). The precipitate wassolubilized in water and then dialyzed extensively against sodiumacetate buffer (pH 5.0, 50 mM) altering with deionized water. Afterfiltration, the IgG fraction was stabilized with sodium azide (0.01%).

Using immunodiffusion in agar plates all three cellulases form a singleimmunoprecipitate with its homologous antiserum and no precipitate wasseen between the 3 cloned cellulases and the sera raised against theother two cellulases.

H-I. Performance of Endoglucanase of Construction 1 (SEQ ID NO: 3)Measured in Buffer as Removal of Surface Fibrils and Fibers Protrudingfrom the Yarn of a Textile Containing Cellulosic Fibers

Apparatus Terg-o-tometer Liquid volume 100 ml Agitation 150movements/min (rpm) Rinse time 5 min in tap water Washing temp 40° C.Water Hardness 1 mM CaCl₂ Washing liquor 0.05 M phosphate buffer pH 7.0Washing time 30 min Repetitions 2 Textile 2 swatches of aged black, 100%cotton 5 × 6 cm Drying Tumble dryEvaluation:

The light remission was measured by a Macbeth Color Eye 7000 Remissionspectrophotometer. Remission is calculated as delta L (HunterLab-values). When the surface fibrils and fibers protruding from theyarn were removed by the cellulase, the surface appeared more bright,and lower L values were obtained.

Results:

S-CEVU/l 0 250 1000 Inventive enzyme 0 −1.4 −1.6 The data show that theenzyme of the invention gives very good color clarification under theconditions tested.

H-II. Performance of Cloned Endoglucanase from Thielavia terrestris (SEQID NO: 12) in Buffer Measured as Removal of Surface Fibrils and FibersProtruding from the Yarn of a Textile Containing Cellulosic Fibers

Apparatus Terg-o-tometer Liquid volume 100 ml Agitation 150movements/min with vertical stirrer Rinse time 10 min in tapwaterWashing temp 40° Washing liqour 0.05 M phosphate buffer. pH 7.0 Washingtime 30 min Repetitions 2 Textile 2 swatches of aged black cotton 5 × 6cm (app. 150 g/m²) Drying Tumble dryEvaluation:

The light remission was measured by a Datacolor Elrepho Remissionspectrophotometer. Remission is calculated as delta L (HunterLab-values). When the surface fibrils and fibers protruding from theyarn are removed by the cellulase, the surface of the black fabricappears darker and nicer, and lower L values are obtained.

Results:

S-CEVU/l 0 50 200 Inventive enzyme 0 −0.66 ± 0.10 −1.32 ± 0.06 The datashow that the cellulase gives good color clarification under theconditions tested.

H-III. Performance of Endoglucanase of Volutella colletrichoides (SEQ IDNO: 9) Measured in Buffer as Removal of Surface Fibrils and FibersProtruding from the Yarn of a Textile Containing Cellulosic Fibers

Apparatus Terg-o-tometer Liquid volume 100 ml Agitation 150movements/min with vertical stirrer Rinse time 5 min in tapwater Washingtemp 40° C. Washing liqour 0.05 M phosphate buffer pH 7.0 Washing time30 min Repetitions 2 Dosage 2.5 S-CEVU/ml Textile 2 swatches of agedblack 100% cotton 5 × 6 cm (0.9 gram) Drying Tumble dryEvaluation:

The light remission is measured by a Datacolor Elrepho Remissionspectrophotometer. Remission is calculated as delta L (HunterLab-values). When the surface fibrils and fibers protruding from theyarn are removed by the cellulase, the surface of the black fabricappears darker, and lower L values are obtained.

The sample is compared with a blind sample, i.e. washed without enzyme:

No cellulase With cellulase 0.00 −0.57Delta L remission values compared to blind sample.

The data shows that the Volutella colletrichoides cellulase gives goodcolor clarification under the conditions tested.

H-IV. Performance of Cloned Cellulases from Thielavia terrestris andAcremonium sp. CBS 478.94 in High pH Heavy Duty Detergent Measured asRemoval of Surface Fibrils and Fibers Protruding from the Yarn of aTextile Containing Cellulosic Fibers

Apparatus Terg-o-tometer Liquid volume 150 ml Agitation 150movements/min with vertical stirrer Rinse time 10 min in tapwaterWashing temp 35° C. Washing liqour 1.0 g/l US type HDG (zeolite/sodabuilt, anionic/nonionic weight ratio > 2.5) pH 10.0 Hardness 1.0 mMCaCl₂ 0.34 mM MgCl₂ Washing time 12 min Repetitions 6 Textile 2 swatchesof aged black cotton 5 × 6 cm (app. 150 g/m²) 2 swatches of heavyknitted cotton 5 × 6 cm (app. 600 g/m²) Drying Tumble dryEvaluation:

The light remission is measured by a Datacolor Elrepho Remissionspectrophotometer. Remission is calculated as delta L (HunterLab-values). When the surface fibrils and fibers protruding from theyarn are removed by the cellulase, the surface of the black fabricappears darker and nicer, and lower L values are obtained. Differentdosages of cloned cellulases from Thielavia terrestris (SEQ ID NO: 12)and Acremonium sp. CBS 478.94 (SEQ ID NO: 8), respectively, (denoted Aand B, respectively) were tested.

Results:

S-CEVU/I 0 500 2000 A 0 −2.09 ± 0.22 −2.86 ± 0.19 B 0 −0.60 ± 0.36 −1.96± 0.23 The data show that both cellulases gives good color clarificationunder the conditions tested.

H-V. Performance of Cellulases Cloned from Thielavia terrestris andAcremonium sp. CBS 478.94, and Construction 1 (SEQ ID NO: 3) Measured asRemoval of Surface Fibrils and Fibers Protruding from the Yarn of aTextile Containing Cellulosic Fibers

Apparatus Terg-o-tometer Liquid volume 150 ml Agitation 150movements/min with vertical stirrer Rinse time 10 min in tapwaterWashing temp 35° C. Hardness 1.0 mM CaCl₂ 0.34 mM MgCl₂ Washing liqour2.0 g/l HDL (neutral, citrate built HDL, with nonionic/ anionic weightration > 0.5) pH 7.5 Washing time 30 min Repetitions 2 Textile 2swatches of aged black cotton 5 × 6 cm (app. 150 g/m²) 2 swatches ofheavy knitted cotton 4 × 7 cm (app. 600 g/m²) Drying Tumble dryEvaluation:

The light remission is measured by a Datacolor Elrepho Remissionspectrophotometer. Remission is calculated as delta L (HunterLab-values). When the surface fibrils and fibers protruding from theyarn are removed by the cellulase, the surface of the black fabricappears darker and nicer, and lower L values are obtained. Threedifferent dosages of cloned cellulases from Thielavia terrestris (SEQ IDNO: 12) and Acremonium sp. CBS 478.94 (SEQ ID NO: 8) and theconstruction 1 (SEQ ID NO: 3), respectively, (denoted A and B and C,respectively) were tested.

Results:

S-CEVU/I 0 100 200 400 A 0 −3.06 ± 0.24 −3.15 ± 0.27 −3.92 ± 0.26 B 0−1.75 ± 0.27 −3.08 ± 0.32 −3.51 ± 0.44 C 0 −1.84 ± 0.39 −1.70 ± 0.47−2.30 ± 0.61 The data show that all cellulases give very good colorclarification under the conditions tested.

I. Application of Endoglucanases from Thielavia terrestris, Acremoniumsp. and Construction 1 (SEQ ID NO: 3) in Denim Finishing

Experimental

Apparatus Washing machine Wascator FL 120 Liquid volume 20 L Fabric 1.1kg denim fabric, 14½ oz 100% cotton Desizing 10 min, 55□C., pH 7 50 mlAquazyme 120 L 2.5 g/l Phosphate buffer Abrasion 2 hours;

pH and temperature varied according to the following table:

Enzyme Activity pH/temp Buffer system SEQ ID No. 3 1400 S-CEVU/g 6/55°C. 2.5 g/l phosphate buffer No. 12  292 S-CEVU/g 5/65° C.   1 g/lcitrate buffer No. 8  782 S-CEVU/g 7/45° C. 2.5 g/l phosphate bufferInactivation: 15 min, 80° C. 1 g/l sodium carbonate Rinses: Three rinsecycles of 5 min in cold tap waterEvaluation:Abrasion: The remission from the fabric was determined at 420 nm using aTexflash 2000 as a measure of the abrasion level.

The results from the treatment of the denim fabric with differentendoglucanases of the invention is shown in the following table:

Abrasion Enzyme Dosage Trial conditions 420 nm Blank  0 S-CEVU/g textilepH 6, 55° C. 9.96  SEQ ID NO: 3 10 S-CEVU/g textile pH 6, 55° C. 14.37Blank  0 S-CEVU/g textile pH 5, 65° C. 9.26 SEQ ID NO: 12 10 S-CEVU/gtextile pH 5, 65° C. 16.86 Blank  0 S-CEVU/g textile pH 7, 45° C. 9.47 SEQ ID NO: 8 10 S-CEVU/g textile pH 7, 45° C. 14.08

All tested cellulases show excellent performance in denim finishing,although each enzyme is unique in its own way. When applying the enzymecorresponding to SEQ ID NO: 3 for denim finishing it is possible toreach a high abrasion level with a minimum of strength loss. Whentreating denim with the enzyme corresponding to SEQ ID NO: 12, a veryhigh wash down can be reached which leaves the fabric with an almostbleached appearance. Denim finishing with the enzyme corresponding toSEQ ID NO: 8 gives a high abrasion level at a low temperature optimumwhich makes it possible to reduce the processing temperature and saveenergy.

J. Use of Cloned Cellulases from Acremonium sp. and Thielavia terrestrisfor Biopolishing of Lyocell Fibers

Lyocell fibers which are sold under the trade name Tencel are spun fromwood pulp cellulose in a more environmentally friendly waterbasedsolvent than is the case for normal viscose production). However, thefibers have a tendency to fibrillate when they are processed intotextiles which is seen on the surface and denoted “fuzz”. By usingcellulases it is possible to permanently remove the exposed and fuzzyfibers and significantly improve the look of the finished fabric, thetreatment generally known as Biopolishing. The endoglucanases of thepresent invention are especially suited for the removal of Lyocellsurface fibers.

Materials and Methods

The textile substrate was either 100% woven or different kinds of jerseyknitted dark blue Tencel. The dark colour and jersey knit was preferredin order to enhance the visual effects which simplifed the evaluation. Awoven 70/30 Tencel/Rayon blend was also used to a lesser extent.

The assays were either performed in 200 ml scale using a Launder-o-meteror in the 20 l scale using a Wascator. The treatment time was 60 min at55° C. in Wascator and 60-90 min in LOM. The buffer was 2 g/l sodiumacetate adjusted to pH 5 with acetic acid. The fabric to liquid ratiowas 1:10 but in the Launder-o-meter 20 steel balls with a diameter of 14mm (11 g each) was used to obtain sufficient mechanical abrasion. Thebiopolishing was immediately followed by inactivation using 2 g/l sodiumcarbonate at 80° C. for 15 min followed by rinsing in cold water.

The results were evaluated using a fuzz note scale from 1-5 were 1 isthe fibrillated look of the starting material and 5 is a high qualitylook with no visible fibers on the surface. Since the performance ofendocellulases is specific towards a surface treatment the weightloss isbelow 2% and is therefore not included in the evaluation. Two cellulaseswere evaluated: the cellulases cloned from Acremonium sp. (SEQ ID NO: 8)and from Thielavia terrestris (SEQ ID NO: 12).

The two cellulases are able to defibrillate both Tencel and Tencelblended fabrics. By using an endoglucanase of the invention, only smallfibrils are removed rather than whole fibers such as is the case whenusing acid cellulase mixtures from Trichoderma. The strength loss of thetreated fabric is threrefore kept at a minimum when using endoglucanasesof the present invention.

The following dosages gave a superior defibrillation, i.e. fuzz note 4or above:

-   15 S-CEVU/g fabric of cellulase from Acremonium sp (SEQ ID NO: 8);    and-   10 S-CEVU/g fabric of cellulase from Thelavia terrestris (SEQ ID NO:    12).

EXAMPLE 2 A New Cellulytic Enzyme was by Expression Cloning as Well asby PCR Cloning Detected to be Produced by a Plant Pathogen, Isolatedfrom Soy Bean Seeds and Identified as Macrophomina phaseolina

Production of Biomass for PCR and Expression Cloning Procedures:

Isolate CBS 281.96 was grown in shake flask cultures on celluloseenriched potato dextrose broth, incubated for 5 days at 260 C. (shakingconditions: 150 rpm).

A. Cloning and Expression of an Endoglucanase from Macrophominaphaseolina

mRNA was isolated from Macrophomina phaseolina, grown in acellulose-containing fermentation medium with agitation to ensuresufficient aeration. Mycelia were harvested after 3-5 days' growth,immediately frozen in liquid nitrogen and stored at −80° C. A libraryfrom Macrophomina phaseolina, consisting of approx. 10⁶ individualclones was constructed in E. coli as described with a vector backgroundof 1%.

Plasmid DNA from some of the pools was transformed into yeast, and50-100 plates containing 250-400 yeast colonies were obtained from eachpool.

Endoglucanase-positive colonies were identified and isolated on SC-agarplates with the AZCL HE cellulose assay. cDNA inserts were amplifieddirectly from the yeast colonies and characterized as described in theMaterials and Methods section above. The DNA sequence of the cDNAencoding the endoglucanase is of SEQ ID NO: 13 and the correspondingamino acid sequence is of SEQ ID NO: 14.

The cDNA is obtainable from the plasmid in DSM 10512.

Total DNA was isolated from a yeast colony and plasmid DNA was rescuedby transformation of E. coli as described above. In order to express theendoglucanse in Aspergillus, the DNA was digested with appropriaterestriction enzymes, size fractionated on gel, and a fragmentcorresponding to the endoglucanase gene was purified. The gene wassubsequently ligated to pHD414, digested with appropriate restrictionenzymes, resulting in the plasmid pA2C477.

After amplification of the DNA in E. coli the plasmid was transformedinto Aspergillus oryzae as described above.

Screening of the cDNA Library by Hybridization and Characterization ofthe Positive Clones

Approximately 6000 colony forming units (c.f.u.) from the Macrophominaphaseolina cDNA library in E. coli was screened by colony hybridizationusing a random-primed ³²P-labeled PCR product from M. phaseolina asprobe. The PCR product was generated as described in the Materials andmethods section. The positive cDNA clones were characterized bysequencing the ends of the cDNA inserts, and by determining thenucleotide seuence of the longest cDNA from both strands. The DNAsequence of the cDNA encoding the endoglucanase is of SEQ ID NO: 13 andthe corresponding amino acid sequence is of SEQ ID NO: 14.

B. Construction of Gene Fusion Between the Endoglucanase fromMacrophomina phaseolina and the 43 kD Endoglucanase from Humicolainsolens

One construction was prepared in order to make a derivative of theendoglucanase from M. phaseolina with the linker and CBD from the 43 kDendoglucanase from H. insolens (disclosed in WO 91/17243). The nativeendoglucanase from M. phaseolina does not have a linker and/or acellulose binding domain, CBD.

The construction consists of the endoglucanase from M. phaseolina (223amino acids) and the 72 C-terminal amino acids from the H. insolens 43kD endoglucanase. (SEQ ID NO: 24)

The 43 kD endoglucanase cDNA from H. insolens is cloned into pHD414 insuch a way that the endoglucanase gene is transcribed from theTaka-promoter. The resulting plasmid is named pCaHj418.

The cDNA encoding the endoglucanase from M. phaseolina (SEQ ID NO: 13)is cloned into pYES2.0 as a BstX I/Not I fragment and the resultingplasmid is named pC1C477.

Primers: primer 1:5′-GGTCGCCCGGACTGGCTGTTCCCGTACCCCCTCCAGCAGCACCAGCTCTCCGG-3′ (SEQ IDNO:94) primer 2:5′-CCGGAGAGCTGGTGCTGCTGGAGGGGGTACGGGAACAGCCAGTCCGGGCGACC-3′ (SEQ IDNO:95) pYES2.0 F.HT primer: 5′-CGGACTACTAGCAGCTGTAATACG-3′ (SEQ IDNO:96) AMG-term. Primer: 5′-CCCCATCCTTTAACTATAGCG-3′ (SEQ ID NO:93)

The endoglucanase fusion is constructed by the PCR overlap-extensionmethod as described by Higuchi et al. 1988.

Reaction A: The Polymerase Chain Reaction (PCR) is used to amplify thefragment of pCaHj418 between primer 1 and AMG-term. primer (the linkerand CBD from the 43 kD endoglucanase from H. insolens).

Reaction B: PCR amplification of the fragment between pYES2.0 F.HTprimer and primer 2 in pC1C477, the endoglucanase gene from M.phaseolina.

Reaction C: The two purified fragments are used in a third PCR in thepresence of the primers flanking the total region, i.e. pYES2.0 F.HTprimer and AMG-term. primer.

The fragment amplified in reaction C is purified, digested withrestriction enzymes, e.g. Xba I and BamH I. The purified digestedfragment is ligated into pHD414 digested with restriction enzymes, e.g.Xba I and BamH I.

Competent cells from E. coli strain DH5αF′ (New England Biolabs) aretransformed with the ligated plasmid and colonies containing the genefusion are isolated. The sequence of the cloned part was verified by DNAsequencing.

Polymerase Chain Reactions are carried out under standard conditions, asrecommended by Perkin-Elmer.

Reaction A and B start with 2 min. at 94° C. followed by 20 cycles of(30 sec. at 94° C., 30 sec. at 52° C. and 1 min. at 72° C.) and endswith 4 min. at 72° C.

Reaction C starts with (2 min. at 94° C., 1 min. at 52° C. and 2 min. at72° C.), followed by 20 cycles of (30 sec. at 94° C., 30 sec. at 52° C.and 90 sec. at 72° C.) and ends with 4 min. at 72° C.

The construct may be transformed into Aspergillus oryzae as describedabove.

EXAMPLE 3 Cloning and Expression of an Endoglucanase from Acremonium sp.and Sordaria fimicola

Production of biomass for expression cloning procedures: Isolates CBS478.94 and ATCC 52644, respectively, were grown in shake flask cultureson cellulose enriched potato dextrose broth, incubated for 5 days at 260C (shaking conditions: 150 rpm).

mRNA was isolated from Acremonium sp., CBS 478.94, and Sordariafimicola, ATCC 52644, respectively, grown in a cellulose-containingfermentation medium with agitation to ensure sufficient aeration.Mycelia were harvested after 3-5 days' growth, immediately frozen inliquid nitrogen and stored at −80° C. Libraries from Acremonium sp., andSordaria fimicola, respectively, each consisting of approx. 10⁶individual clones were constructed in E. coli as described with a vectorbackground of 1%.

Plasmid DNA from some of the pools from each library was transformedinto yeast, and 50-100 plates containing 250-400 yeast colonies wereobtained from each pool.

Endoglucanase-positive colonies were identified and isolated on SC-agarplates with the AZCL HE cellulose assay. cDNA inserts were amplifieddirectly from the yeast colonies and characterized as described in theMaterials and Methods section above.

The DNA sequence of the cDNA encoding the endoglucanase from Acremoniumsp. is of SEQ ID NO: 9 and the corresponding amino acid sequense is ofSEQ ID NO: 10. The cDNA is obtainable from the plasmid in DSM 10080.

The partial DNA sequence of the cDNA encoding the endoglucanase fromSordaria fimicola is of SEQ ID NO: 25 (Nucleotide sequence of the 5′-endof the cDNA) and the corresponding amino acid sequence is of SEQ ID NO:26. The cDNA is obtainable from the plasmid in DSM 10576.

Total DNA was isolated from a yeast colony and plasmid DNA was rescuedby transformation of E. coli as described above. In order to express theendoglucanase in Aspergillus, the DNA was digested with appropriaterestriction enzymes, size fractionated on gel, and a fragmentcorresponding to the endoglucanase gene from Acremonium sp. and Sordariafimicola, respectively, was purified. The genes were subsequentlyligated to pHD414, digested with appropriate restriction enzymes,resulting in the plasmids pA2C371 and pA2C502, respectively.

After amplification of the DNA in E. coli the plasmids were transformedinto Aspergillus oryzae as described above.

EXAMPLE 4 A. Cloning by PCR an Endoglucanase from Crinipellis scabella,CBS 280.96

Isolate CBS 280.96 was grown in static flask cultures, holding wheatbran medium (per flask: 300 g wheat bran added 450 ml salt solution),incubated for 6 days at 26° C. After incubation the wheat bran wasextracted with destined water (300 ml per flask) and the extract testedfor endoglucanase activity (0.1% AZCL-HE-Cellulose (megazyme) in 1%agarose (Litex agarose, Medinova). Activity was observed on the platesholding pH of 3.0, 7.0 and 9.5.

mRNA was isolated from Crinipellis scabella grown as describe above.Mycelia were harvested after 3-5 days' growth, immediately frozen inliquid nitrogen and stored at −80° C. A library from Crinipellisscabella, consisting of approx. 10⁶ individual clones was constructed inE. coli as described with a vector background of 1%.

Approximately 10 000 colony forming units (c.f.u.) from the Crinipellisscabella cDNA library in E. coli was screened by colony hybridizationusing a random-primed ³²P-labeled PCR product from C. scabella as probe.The PCR product was generated as described in the Materials and methodssection. The positive cDNA clones were characterized by sequencing theends of the cDNA inserts, and by determining the nucleotide seuence ofthe longest cDNA from both strands.

The DNA sequence of the cDNA encoding the endoglucanase is of SEQ ID NO:15 and the corresponding amino acid sequence is of SEQ ID NO: 16.

The cDNA is obtainable from the plasmid in DSM 10511.

Total DNA was isolated from a yeast colony and plasmid DNA was rescuedby transformation of E. coli as described above. In order to express theendoglucanse in Aspergillus, the DNA was digested with appropriaterestriction enzymes, size fractionated on gel, and a fragmentcorresponding to the endoglucanase gene was purified. The gene wassubsequently ligated to pHD414, digested with appropriate restrictionenzymes, resulting in the plasmid pA2C475.

After amplification of the DNA in E. coli the plasmid was transformedinto Aspergillus olyzae as described above.

Construction of Two Gene Fusions Between the Endoglucanase fromCrinipellis scabella and the Linker/CBD Region of the 43 kDaEndoglucanase from Humicola insolens

The native endoglucanase from Crinipellis scabella neither has a linkernor a cellulose binding domain (CBD). In addition, the full-length cDNAcontains an ATG start codon upstream from the endoglucanase encodingopen reading frame (ORF), presumably resulting in scrambled translationinitiation upon heterologous expression of the cDNA, such as in theyeast Saccharomyces cerevisiae and the filamentous fungus Aspergillusoryzae. Thus, two gene fusions between the endoglucanase fromCrinipellis scabella and the linker/CBD region of the 43 kDendoglucanase from Humicola insolens (disclosed in WO 91/17243) has beenconstructed using splicing by overlap extension (SOE) (Horton et al,1989).

Construction 1 consists of the cDNA encoding the 226-residueendoglucanase from C. scabella fused by PCR with the 3′-end cDNA of H.insolens coding for the linker and CBD region (72 amino acids) at theCOOH-terminus of the H. insolens 43 kD endoglucanase. The second hybridconstruct is identical to the abovementioned gene fusion, except thatthe first five residues from the putative signal peptide have beendeleted by PCR resulting in a shorter signal, which starts with thesecond in-frame ATG start codon.

Plasmid Constructs

The plasmid pC1C475 contains the full-length cDNA from C. scabella,cloned into BstXI/NotI-cut yeast expression vector pYES 2.0, the plasmidpC1C144 contains the full-length cDNA from H. insolens, cloned into theBstXI site of pYES 2.0.

Splicing by Overlap Extension

Two PCR fragments encoding the core region of the endoglucanase from C.scabella were generated in PCR buffer (10 mM Tris-HCl, pH 8.3, 50 mMKCl, 1.5 mM MgCl₂, 0.01% gelatin; containing 200 μM each dNTP), using50-100 ng of pC1C475 as template, and 250 pmol of the reverse primer(5′-GACCGGAGAGCTGGTGCTGCTGGAGGGTTTACGAACACAGCCCGAGATATTAGTG -3′ (SEQ

(forward no. 1 5′-CCCCAAGCTTGACTTGGAACCAATGGTCCATCC-3′ (SEQ ID NO:98), forward no. 2 5′-CCCCAAGCTTCCATCCAAACATGCTTAAAACGCTCG-3′ (SEQ IDNO:99)),(Landgraf, Germany) and 2.5 units of Taq polymerase (Perkin-Elmer,Cetus, USA). Thirty cycles of PCR were performed using a cycle profileof denaturation at 94° C. for 1 min, annealing at 55° C. for 2 min, andextension at 72□ C. for 3 min. The PCR fragment coding for the linkerand CBD of the endoglucanase of H. insolens was generated in PCR buffer(10 mM Tris-HCl, pH 8.3, 50 mM KCl, 1.5 mM MgCl₂, 0.01% gelatin;containing 200 μM each dNTP) using 100 ng of the pC1C144 template, 250pmol forward primer(5′-CACTAATATCTCGGGCTGTGTTCGTAAACCCTCCAGCAGCACCAGCTCTCCGGTC-3′ (SEQ IDNO: 100)), 250 pmol of the pYES 2.0 reverse primer(5′-GGGCGTGAATGTAAGCGTGACATA-3′ (SEQ ID NO: 101)), a DNA thermal cycler(Landgraf, Germany) and 2.5 units of Taq polymerase (Perkin-Elmer, USA).Thirty cycles of PCR were performed as above. The PCR products wereelectrophoresed in 0.7% low gelling temperature agarose gels (SeaPlaque,FMC), the fragments of interest were excised from the gel and recoveredby treatment with agarase (New England Biolabs, USA) according to themanufacturer's instructions, followed by phenol extraction and ethanolprecipitation at −20° C. for 12 h by adding 2 vols of 96% EtOH and 0.1vol of 3 M NaAc.

The recombinant hybrid genes between the endoglucanase from Crinipellisscabella and the linker/CBD region of the 43 kD endoglucanase fromHumicola insolens were generated by combining the overlapping PCRfragments from above (ca. 50 ng of each template) in two combinations inPCR buffer (10 mM Tris-HCl, pH 8.3, 50 mM KCl, 1.5 mM MgCl₂, 0.01%gelatin; containing 200 μM each dNTP). The SOE reaction was carried outusing the DNA thermal cycler (Landgraf, Germany) and 2.5 units of Taqpolymerase (Perkin-Elmer, Cetus, USA). Two cycles of PCR were performedusing a cycle profile of denaturation at 94° C. for 1 min, annealing at55° C. for 2 min, and extension at 72□ C. for 3 min, the reaction wasstopped, 250 pmol of each end-primer

(forward no. 1 5′-CCCCAAGCTTGACTTGGAACCAATGGTCCATCC-3′ (SEQ ID NO:98), forward no. 2 5′-CCCCAAGCTTCCATCCAAACATGCTTAAAACGCTCG-3′ (SEQ IDNO:99), reverse primer 5′-GGGCGTGAATGTAAGCGTGACATA-3′ (SEQ ID NO:101))mixture, and an additional 30 cycles of PCR were performed using a cycleprofile of denaturation at 94° C. for 1 min, annealing at 55° C. for 2min, and extension at 72° C. for 3 min.Construction of the Expression Cassettes for Heterologous Expression inAspergillus oryzae

The PCR-generated, recombinant fragments were electrophoresed in a 0.7%low gelling temperature agarose gel (SeaPlaque, FMC), the fragments ofinterest were excised from the gel and recovered by treatment withagarase (New England Biolabs, USA) according to the manufacturer'sinstructions, followed by phenol extraction and ethanol precipitation at−20° C. for 12 h. The DNA fragments were digested to completion withHindIII and XbaI, and ligated into HindIII/XbaI-cleaved pHD414 vectorfollowed by electroporation of the constructs into E. coli DH10B cellsaccording to the manufacturer's instructions (Life Technologies, USA).

The nucleotide sequence of the resulting gene fusions were determinedfrom both strands as described in the Materials and methods section, SEQID NOS: 17 and 19. The constructs may be transformed into A. oryzae asdescribed.

EXAMPLE 5 PCR Facilitated Detection of Said Type of Cellulytic Enzymefrom 46 Filamentous and Monocentric Fungi, Representing 32 Genera, from23 Families, Belonging to 15 Orders of 7 Classes, Covering All in AllAll Four Groups of the True Fungi: Ascomycetous, Basidiomycetous,Chytridiomycetous and Zygomycetous Fungi

5.1 Materials

-   1. Diplodia gossypina Cooke-   Deposit of Strain, Acc No: CBS 274.96-   2. Ulospora bilgramii (Hawksw. et al.)-   Acc No of strain: NKBC 1444,-   3. Microsphaeropsis sp-   4. Ascobolus stictoideus Speg.-   Acc No of strain: Q026 (Novo Nordisk collection)-   Isolated from goose dung, Svalbard, Norway-   5. Saccobolus dilutellus (Fuck) Sacc.-   Deposit of strain: Acc No CBS 275.96-   6. Penicillium verruculosum Peyronel-   Ex on Acc No of species: ATCC 62396-   7. Penicillium chrysogenum Thom-   Acc No of Strain: ATCC 9480-   8. Thermomyces verrucosus Pugh et al-   Deposit of Strain, Acc No.: CBS 285.96-   9. Xylaria hypoxylon L. ex Greville-   Deposit of Strain, Acc No: CBS 284.96-   10. Poronia punctata (Fr.ex L.) Fr.-   Ref:A. Munk: Danish Pyrenomycetes,-   Dansk Botanisk Arkiv, Vol17, 1 1957-   11. Nodulisporum sp-   Isolated from leaf of Camellia reticulatá (Theaceae, Guttiferales),-   Kunming Botanical Garden, Yunnan Province, China-   12. Cylindrocarpon sp-   Isolated from marine sample, the Bahamas-   13. Fusarium anguioides Sherbakoff-   Acc No of strain: IFO 4467-   14. Fusarium poae (Peck) Wr.-   Ex on Acc No of species: ATCC 60883-   15. Fusarium solani (Mart.)Sacc.emnd.Snyd & Hans.-   Acc No of strain: IMI 107.511-   16. Fusarium oxysporum ssp lycopersici (Sacc.)Snyd. & Hans.-   Acc No of strain: CBS 645.78-   17. Fusarium oxysporum ssp passiflora-   Acc No of strain: CBS 744.79-   18. Gliocladium catenulatum Gillman & Abbott-   Acc. No. of strain: ATCC 10523-   19. Nectria pinea Dingley-   Deposit of Strain, Acc. No. CBS 279.96-   20. Sordaria macrospora Auerswald-   Ex on Acc No of species: ATCC 60255-   21. Humicola grisea Traeen-   ex on Acc No for the species: ATCC 22726-   22. Humicola nigrescens Omvik-   Acc No of strain: CBS 819.73-   23. Scytalidium thermophilum (Cooney et Emerson) Austwick-   Acc No of strain: ATCC 28085-   24. Thielavia thermophila Fergus et Sinden-   (syn Corynascus thermophilus)-   Acc No of strain: CBS 174.70, IMI 145.136-   25. Cladorrhinum foecundissimum Saccardo et Marchal-   Ex on Acc No of species: ATCC 62373-   26. Syspastospora boninensis-   Acc No of strain: NKBC 1515 (Nippon University, profe Tubaki    Collection)-   27. Chaetomium cuniculorum Fuckel-   Acc. No. of strain: CBS 799.83-   28. Chaetomium brasiliense Batista et Potual-   Acc No of strain: CBS 122.65-   29. Chaetomium murorum Corda-   Acc No of strain: CBS 163.52-   30. Chaetomium virescens (von Arx) Udagawa-   Acc.No. of strain: CBS 547.75-   31. Nigrospora sp-   Deposit of strain, Acc No: CBS 272.96-   32. Nigrospora sp-   Isolated from:-   33. Diaporthe syngenesia-   Deposit of strain, Acc No: CBS 278.96-   34. Colletotrichum lagenarium (Passerini) Ellis et Halsted-   syn Glomerella cingulata var orbiculare Jenkins et Winstead-   Ex on acc No of species: ATCC 52609-   35. Exidia glandulosa Fr.-   Deposit of Strain, Acc No: CBS 277.96-   36. Fomes fomentarius (L.) Fr.-   Deposit of strain: Acc No. CBS 276.96-   37. Spongipellis (?)-   Deposit of Strain: Acc No CBS 283.96-   38. Rhizophlyctis rosea (de Bary & Wor) Fischer-   Deposit of Strain: Acc No.: CBS 282.96-   39. Rhizomucor pusillus (Lindt) Schipper-   syn: Mucor pusillus-   Acc No of strain: IFO 4578-   40. Phycomyces nitens (Kunze) van Tieghem & Le Monnier-   Acc No of strain: IFO 4814-   41. Chaetostylum fresenii van Tieghem & Le Monnier-   syn. Helicostylum fresenii-   Acc No of strain NRRL 2305-   42. Trichothecium roseum, Acc No of strain: IFO 5372-   43. Coniothecium sp-   Endophyte, isolated from leaf of flowering plant,-   Kunming, Yunnan, China-   44. Deposit of strain, Acc No.: CBS 271.96-   Coelomycete, Isolated from leaf of Artocarpus altilis-   (Moraceae, Urticales), Christiana, Jamaica-   45. Deposit of strain, Acc No.: CBS 273.96-   Coelomycete, isolated from leaf of Pimenta dioica-   (Myrtaceae, Myrtales), Dallas Mountain, Jamaica-   46. Deposit of strain: CBS 270.96-   Coelomycete, isolated from leaf of Pseudocalymma alliaceum    (Bignoniaceae, Solanales) growing in Dallas Mountain, Jamaica    5.2 Procedure    Maintenance of Strains and Production of Biomass:

The strains were maintained on agar in petrie dishes (9 cm) or on slants(see list of Media: PCA and PDA). 44 of the strains were grown in shakeflasks under the following growth conditions: general fungal media asPC, PD and PB 9 or YPG (see list of media); incubation time from 3 to 9days; temperature 26° C.; rpm between 150 and 175. Strain No 14 (F.poae) was grown on wheat bran for 15 days (26° C.; static). Strain No 38was grown in dilute salt solution (DS/2), added 1 cm² pieces ofautoclaved filter paper.

Activity Test:

Activity was tested on 0.1% AZCL-HE-Cellulose (Megazyme) plates (14 cmPetrie dishes), made up in 1% agarose (HSB, Litex Agarose, Medinova).All tests were done in triplicate, viz. AZCL-HE-Cellulose dissolved inthree buffers, adjusted to pH 3, 7 or 9.5 (using various proportions ofthe following two ingredients Citric acid monohydrat, Merck art. No100244 (21.0 g) dissolved in water, making a total of 1000 ml; 0.1Mtri-Sodium dodecabrohydrate, Merck art.no. 6578 (38 g), dissolved inwater, making a total of 1000 ml. The mixing is done immidiately beforeuse.

Harvesting of Biomass

The biomass was harvested by filtering (mesh adjusted to the growth ofthe fungus, the finest used for fungi which have highly sporulatingmycelium as e.g. Fusarium spp.). The biomass on the filter was scrapedinto a sterile plastic bag and immidiately frozen (by submerging intoliquid nitrogen).

5.3 Results

I. Using the PCR screening and amplification techniques described inMaterials and Methods the following partial cDNA sequences wereobtained:

Saccobolus dilutellus (Fuck) Sacc., CBS 275.96: SEQ ID NO: 27 (and thededuced amino acid sequence in SEQ ID NO: 28);

Thermomyces verrucosus, CBS 285.96: SEQ ID NO: 29 (and the deduced aminoacid sequence in SEQ ID NO: 30);

Xylaria hypoxylon, CBS 284.96: SEQ ID NO: 31 (and the deduced amino acidsequence in SEQ ID NO: 32);

Fusarium oxysporum ssp lycopersici, CBS 645.78: SEQ ID NO: 33 (and thededuced amino acid sequence in SEQ ID NO: 34);

Nectria pinea, CBS 279.96: SEQ ID NO: 35 (and the deduced amino acidsequence in SEQ ID NO: 36);

Humicola grisea, ATCC 22726: SEQ ID NO: 37 (and the deduced amino acidsequence in SEQ ID NO: 38);

Humicola nigrescens, CBS 819.73: SEQ ID NO: 39 (and the deduced aminoacid sequence in SEQ ID NO: 40);

Cladorrhinum foecundissimum, ATCC 62373: SEQ ID NO: 41 (and the deducedamino acid sequence in SEQ ID NO: 42);

Syspastospora boninesis, NKBC 1515: SEQ ID NO: 43 (and the deduced aminoacid sequence in SEQ ID NO: 44);

Nigrospora sp., CBS 272.96: SEQ ID NO: 45 (and the deduced amino acidsequence in SEQ ID NO: 46);

Chaetostylum fresenii: SEQ ID NO: 47 (and the deduced amino acidsequence in SEQ ID NO: 48);

Exidia glandulosa, CBS 277.96: SEQ ID NO: 49 (and the deduced amino acidsequence in SEQ ID NO: 50);

Coniothecium sp.: SEQ ID NO: 51 (and the deduced amino acid sequence inSEQ ID NO: 52);

Deposition No. CBS 271.96: SEQ ID NO: 53 (and the deduced amino acidsequence in SEQ ID NO: 54);

Deposition No. CBS 270.96: SEQ ID NO: 55 (and the deduced amino acidsequence in SEQ ID NO: 56);

Diplodia gossypina, CBS 274.96: SEQ ID NO: 57 (and the deduced aminoacid sequence in SEQ ID NO: 58);

Ulospora bilgramii, NKBC 1444: SEQ ID NO: 59 (and the deduced amino acidsequence in SEQ ID NO: 60);

Penicillium verruculosum, ATCC 62396: SEQ ID NO: 61 (and the deducedamino acid sequence in SEQ ID NO: 62);

Poronia punctata: SEQ ID NO: 63 (and the deduced amino acid sequence inSEQ ID NO: 64);

Fusarium anguioides, IFO 4467: SEQ ID NO: 65 (and the deduced amino acidsequence in SEQ ID NO: 66);

Thielavia thermophila, CBS 174.70: SEQ ID NO: 67 (and the deduced aminoacid sequence in SEQ ID NO: 68);

Chaetomium cuniculorum, CBS 799.83: SEQ ID NO: 69 (and the deduced aminoacid sequence in SEQ ID NO: 70);

Chaetomium virescens: SEQ ID NO: 71 (and the deduced amino acid sequencein SEQ ID NO: 72);

Colletotrichum lagenarium: SEQ ID NO: 73 (and the deduced amino acidsequence in SEQ ID NO: 74);

Phycomyces nitens: SEQ ID NO: 75 (and the deduced amino acid sequence inSEQ ID NO: 76); and

Trichothecium roseum: SEQ ID NO: 77 (and the deduced amino acid sequencein SEQ ID NO: 78);

II. Using the PCR screening and amplification techniques described inMaterials and Methods partial cDNA encoding partially for the enzyme ofthe invention was obtained and the plasmid was deposited according tothe Budapest Treaty:

Escherichia coli, DSM 10583, deposition date 13 Mar. 1996; cDNA fromTrichothecium roseum;

Escherichia coli, DSM 10584, deposition date 13 Mar. 1996; cDNA fromSyspastospora boninesis;

Escherichia coli, DSM 10585, deposition date 13 Mar. 1996; cDNA fromCheatomium murorum;

Escherichia coli, DSM 10587, deposition date 13 Mar. 1996; cDNA fromSordaria fimicola;

Escherichia coli, DSM 10588, deposition date 13 Mar. 1996; cDNA from theunidentified strain CBS 273.96;

Escherichia coli, DSM 10586, deposition date 13 Mar. 1996; cDNA fromSpongipellis sp.

Color Clarification of Crude Supernatants

During normal wash the fabric will often fade. However, the fabricappearance is improved and the original colours are much betterpreserved or maintained if the fabric is washed with a cellulase givingcolor clarification. Color clarification is measured as removal ofsurface fibrils and fibers protruding from the yarn of a textilecontaining cellulosic fibers.

Apparatus Terg-o-tometer Liquid volume 100 ml Agitation 150movements/min with vertical stirrer Rinse time 5 min in tapwater Washingtemp 40° Washing liqour 0.05 M phosphate buffer pH 7.0 Washing time 30min Repetitions 2 Enzymes Crude supernatants from the strains shownbelow. Dosage Two dosages from 200, 500, 1000 or 2500 S-CEVU/I Textile 2swatches of aged black 100% cotton 5 × 6 cm (0.9 gram) Drying Tumble dryEvaluation

The light remission is measured by a Datacolor Elrepho Remissionspectrophotometer. Remission is calculated as delta L (HunterLab-values). When the surface fibrils and fibers protruding from theyarn are removed by the cellulase, the surface of the black fabricappears darker, and lower L values are obtained.

The samples are compared with a blind sample, i.e. washed withoutenzyme. Below is shown the delta L remission values compared to a blindsample.

References Background of the Invention

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THE DRAWINGS

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DETAILED DESCRIPTION

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1. A detergent composition comprising a surfactant and a polypeptideexhibiting endoglucanase activity; which is any of: (a) a polypeptidehaving an amino acid sequence comprising the sequence of SEQ ID NO: 12;(b) a polypeptide encoded by a DNA sequence which hybridizes with SEQ IDNO: 11 or the DNA sequence obtainable from the plasmid in Saccharomycescerevisiae DSM 10081 under the following hybridization conditions:prehybridization and hybridization in a solution of 5×SSC, 5 ×Denhardt'ssolution, 0.5% SDS and 100 micrograms/ml of denatured sonicated salmonsperm DNA for 12 hours at about 45° C., followed by washing in 2×SSC and0.5% SDS at a temperature of 65° C.; and (c) a fragment of the sequenceof SEQ ID NO: 12 which has endoglucanase activity, wherein the detergentcomposition has a pH in the range of 7-11.
 2. The detergent compositionof claim 1, wherein the polypeptide comprises the amino acid sequence ofSEQ ID NO:
 12. 3. The detergent composition of claim 1, wherein thepolypeptide consists of the amino acid sequence of SEQ ID NO:
 12. 4. Thedetergent composition of claim 1, wherein the polypeptide is a fragmentof SEQ ID NO: 12 and has endoglucanase activity.
 5. The detergentcomposition of claim 1, wherein the polypeptide is a Thielaviapolypeptide.
 6. The detergent composition of claim 5, wherein thepolypeptide is a Thielavia terrestris polypeptide.
 7. The detergentcomposition of 1, wherein the polypeptide is encoded by a DNA sequencewhich hybridizes with the DNA sequence of SEQ ID NO: 11 or the DNAsequence obtainable from the plasmid in Saccharomyces cerevisiae DSM10081 under the following hybridization conditions: prehybridization andhybridization in a solution of 5×SSC, 5×Denhardt's solution, 0.5% SDSand 100 micrograms/ml of denatured sonicated salmon sperm DNA for 12hours at about 45° C., followed by washing in 2×SSC and 0.5% SOS at 65°C.
 8. The detergent composition of claim 1, wherein the polypeptide isencoded by a DNA sequence which hybridizes with the DNA sequence of SEQID NO: 11 or the DNA sequence obtainable from the plasmid inSaccharomyces cerevisiae DSM 10081 under the following hybridizationconditions: prehybuldizatlon and hybridization in a solution of 5×SSC,5×Denhardt's solution, 0.5% SDS and 100 micrograms/ml of denaturedsonicated salmon sperm DNA for 12 hours at about 45° C., followed bywashing in 2×SSC and 0.5% SDS at 70° C.
 9. The detergent composition ofclaim 1, wherein the polypeptide is encoded by DNA sequence whichhybridizes with the DNA sequence of SEQ ID NO: 11 or the DNA sequenceobtainable from the plasmid in Saccharomyces cerevisiae DSM 10081 underthe following hybridization conditions: prehybridization andhybridization in a solution of 5×SSC, 5×Denhardt's solution, 0.5% SDSand 100 micrograms/ml of denatured sonicated salmon sperm DNA for 12hours at about 45° C., followed by washing in 2×SSC and 0.5% SDS at 75°C.
 10. The detergent composition of claim 7, wherein the polypeptide isa Thielavia polypeptide.
 11. The detergent composition of claim 8,wherein the polypeptide is a Thielavia polypeptide.
 12. The detergentcomposition of claim 9, wherein the polypeptide is a Thielaviapolypeptide.
 13. The detergent composition of claim 10, wherein thepolypeptide is a Thielavia terrestris polypeptide.
 14. The detergentcomposition of claim 11, wherein the polypeptide is a Thielaviaterrestris polypeptide.
 15. The detergent composition of claim 12,wherein the polypeptide is a Thielavia terrestris polypeptide.
 16. Thedetergent composition of claim 1, further comprising one or moreadditional enzymes.
 17. The detergent composition of claim 1, furthercomprising a detergent builder or complexing agent.
 18. The detergentcomposition of claim 1, further comprising a polymer.
 19. The detergentcomposition of claim 1, further comprising a bleaching system.
 20. Amethod of providing color clarification to laundry, comprising treatingthe laundry with a detergent composition of claim 1.